BUYER’S GUIDE

Porsche 911 (G-Series) Review

The ‘impact’ bumper-era 911 may not have the romance of the ‘60s cars but still offers a cracking Porsche experience. If you’re keen to get behind the wheel of a G Series 911 then this buyer’s guide is a great way to brush up on the different models available and how to protect your investment with the proper classic car insurance.

What is the Porsche G-Series 911?

Technically, “G-Series” was Porsche’s internal name for the 1974 model year, but the term is now commonly used for all 1973–1989 impact-bumper 911s.

For buyers, this is the classic 911 many people picture: compact, mechanical, durable and full of character. It is also valuable, rust-prone in places and increasingly specification-sensitive, so you’re advised to buy on body condition, originality, history and specialist inspection, not just colo
ur or badge.

The Porsche 911 G-Series is the long-running, impact-bumper generation of the air-cooled 911. Built from 1973 to 1989, it kept the classic rear-engined 911 layout but added stronger bumpers, improved safety, better refinement and a wide choice of engines and body styles.

When was the Porsche 911 G-Series produced?

The Porsche 911 G-Series was built between 1973 and 1989, a 16-year run, during which just over 198,400 were made at Porsche’s Stuttgart-Zuffenhausen factory in Germany, the historic home of 911 production.

This total includes a wide spread of variants, including 2.7-litre cars, Carrera, SC, Carrera 3.2, Targa, Cabriolet, Turbo and special models. That variety means values differ sharply by specification, originality and condition.

What changes were made to Porsche G-Series over the years?

The G-Series arrived with impact bumpers to meet safety requirements, plus a 2.7-litre engine range. Early cars included 911, 911 S and Carrera variants, but some 2.7-litre engines can be costly if not properly rebuilt or upgraded.

The 911 Turbo, also known as the 930, arrived in 1975 and gave the range supercar performance. The Carrera 3.0 followed in the mid-1970s and is now highly regarded.

In 1978, the 911 SC replaced much of the earlier range with a 3.0-litre engine and a stronger reputation for durability. The SC is often seen as a sensible classic 911 choice.

The Carrera 3.2 arrived in 1984 with more power, Motronic fuel injection and improved usability. From 1987, the G50 gearbox replaced the earlier 915 gearbox, giving a more modern shift feel. Cabriolet versions joined the Targa and Coupé body styles, and wide-body and Turbo-look cars became especially desirable.

By 1989, the model had become more refined, but still retained the air-cooled 911 character.

What do people love about the G-Series Porsche 911?

People love the G-Series because it feels unmistakably like an old 911. The steering is alive, the engine is vocal, the driving position is distinctive and the rear-engined balance gives the car a character no modern sports car can quite replicate.

It is also usable. A good SC or Carrera 3.2 can tour, commute occasionally, tackle B-roads and attend events without feeling fragile. The cabin is simple, visibility is excellent and the car is small enough to enjoy on modern roads.

There is also the emotional pull. Impact-bumper 911s have become icons: tough, elegant and mechanically honest. They offer a link to Porsche’s air-cooled era while still being practical enough for regular enthusiast use.

What are the common problems with the G-Series 911?

Rust is the biggest concern, as it is with a lot of classic cars. These cars are old, often repaired before, and corrosion can hide beneath paint, underseal and trim. Poor body repairs are expensive to correct.

Mechanically, the flat-six is strong when maintained, but neglect is costly. Check for oil leaks, worn valve guides, broken head studs, tired timing-chain tensioners, smoke, poor starting and evidence of overheating. Early 2.7-litre cars need particular care because some suffered from heat-related engine issues, especially in emissions-controlled markets.

Gearboxes deserve attention. The 915 gearbox needs a deliberate shift and can suffer worn synchros; the later G50 is easier to use but not immune to wear. Also check suspension bushes, brakes, fuel lines, electrics, heat exchangers and exhausts.

A cheap G-Series 911 can quickly become expensive, and a specialist inspection is highly encouraged, especially if you haven’t owned one before.

What should people look for when buying a 911 G-Series?

Start with the body, and inspect the car on a lift if possible, to check for corrosion, accident damage, filler, poor welding and fresh underseal hiding problems. Panel gaps, door fit and signs of previous restoration matter.

Review history carefully. Look for regular servicing, engine rebuild evidence, gearbox work, brake and suspension refreshes, and invoices from recognised Porsche specialists. Matching numbers and original specification can affect value.

On a test drive, the engine should pull cleanly, maintain oil pressure and not smoke excessively. The gearbox should not baulk badly or jump out of gear. Steering, braking and suspension should feel tight. Buy the best car you can afford; restoration costs can exceed the saving on a poor one.

Where does the Porsche G-Series tend to rust?

Important rust areas include the front suspension pan, battery boxes, inner wings, sills, kidney bowls, B-posts, door bottoms, floorpans, torsion bar areas, rear seat pans, scuttle, windscreen surround and rear window corners. Targas and Cabriolets need extra checks around seals, floors and water ingress points.

Also inspect around the fuel tank, jacking points, bumper mounts and under carpets. Rust in structural areas is expensive and should not be treated as minor. A car with glossy paint but weak kidney bowls or a rotten suspension pan is a serious risk.

Front luggage compartment floor

Sills and inner arches, especially on ‘kidney bowl’ reinforcement panels

Sunroof drain holes and roof pillars

Porsche 911 G Series Checklist

Early cars used 2.7-litre engines as a carry-over, a naturally-aspirated version of the Turbo’s 3.0-litre motor arriving on the Carrera for the 1976 model year
From the 1978 model year the 3.0-litre SC engine became standard fit, the aluminium crankcase considered sturdier though power was down due to emissions regulations
The 3.2 introduced for the 1984 model year is another generation on and less likely to suffer obvious oil leaks
Early cars may have a four-speed gearbox but the five-speed ‘915’ gearbox was an option many buyers took up; the shift is less positive than the later G50 and requires an experienced hand to operate smoothly but a well set-up one should be satisfying to use; crunches or seriously baulky shifts may indicate a rebuild is necessary
Not sure if the 3.2 you’re looking has a 915 or G50 gearbox? The easy tell is the position of the reverse indent, which is up and to the left of first on the G50 and down and back from fifth on a 915
Engines should start first turn, idle smoothly, pick up keenly and show a steady oil pressure with revs once warm; smoke or hesitancy are warning signs of issues and, once removed for a rebuild, work can quickly escalate in complexity and cost depending on what is found
Timing chain tensioners on earlier engines can fail; more durable hydraulic ones from later 3.2 engines are a common upgrade
Rusty heat exchangers on the exhaust system are an expensive fix
Bodywork corrosion is the biggest worry on an old 911, even post-1975 models with the galvanised shell
Check every inch, preferably with the car on a ramp if you can; failing that remove mats from the front luggage compartment and inspect the condition of the floor, front crossmember, battery tray and then work your way back looking carefully at sills, inner wings, roof pillars, sunroof drains (where fitted), under the carpets and back into the rear arches
The so-called ‘kidney bowl’ reinforcements at the rear edge of the sills and within the B-pillars are notorious rust spot that require serious surgery to sort properly – beware any sign of bodged repairs in this area
Most cars will have had work done at some stage in their lives; in previous years when they weren’t as valuable this may have been more of the ‘quick fix’ variety so beware patchwork quilt repairs and instead hold out for one where you have evidence of a proper restoration by a respected specialist

How easy is it to get hold of parts for the Porsche 911 (G-Series)?

Parts support is excellent by classic standards. Porsche Classic, independent specialists and aftermarket suppliers support engines, brakes, suspension, trim and body panels.

Common service parts are easy to source. Rare original trim, correct period details, Turbo parts and high-quality body panels can be expensive, but availability is generally strong.

How does it drive?

The word ‘unique’ is much over-used but, truly, nothing else drives like a 911 and a well-sorted impact bumper Carrera offers a fantastic balance of usable performance to be enjoyed as much on a long cruise as on a twisty back road or mountain pass. The small on-road footprint, the upright windscreen and excellent all-round visibility make it easy to place and very exploitable, there being surprising muscularity to the controls for what is a relatively light car.

Quirks like the offset driving position, floor-hinged pedals and wide-hipped stance soon become charming rather than strange, while the breathy bark of that air-cooled flat-six is a fundamental part of the magic. In standard form you’re looking at around 200PS (147kW) depending on the model and which engine it has, which sounds modest but translates to perfectly usable and enjoyable performance on the road thanks to the broad power band.

The much-hyped tail-heavy handling is less of an issue in these cars, especially when you get into the slow-in, fast-out groove the car naturally encourages through its very obvious feedback at the wheel. A good one is, quite simply, a joy to drive.

What’s good about the Porsche 911 G Series?

Half a century on, the shock of the impact bumper look has subsided and appreciation of how neatly Porsche integrated this legislative requirement into the 911 shape has grown. The interchangeability of Porsche parts is, meanwhile, a blessing and a curse, meaning many G-Series cars have been ‘backdated’ to look like older ones, hot-rodded or otherwise modified.

This is all part of the scene but an original, wingless SC or 3.2 Carrera on Fuchs wheels has an elegant, late ‘70s simplicity about it many now covet. And with usable rear seats for the kids, good long-distance refinement and that iconic shape an impact bumper 911 makes for a very usable classic, more than capable of regular driving on modern roads.

There’s obviously a huge scene supporting these cars, and many talented and skilled specialists around to restore them and keep them running properly. Once you’ve had your fun a good one will always be in demand and easy to sell on to the next enthusiast seeking to live the air-cooled 911 dream, too.

What’s bad about the Porsche 911 G Series?

Given the impact bumper cars were, for a long time, considered the cheap route into classic 911 ownership and have now been on the road many decades many will have suffered from ‘make do and mend’ upkeep the inherent strength and build quality of the base car will have permitted. But these are still high-performance, precision instruments and any shortcuts by previous owners can bite you expensively on the backside if you’re suckered into a car that flatters to deceive.

Engines are inherently strong but big jobs and rebuilds quickly escalate in cost and complexity if you’re unlucky. But that’s nothing against the cost of sorting out a rusty car, of which there are sadly many lurking ready to tempt the unwary. Nothing comes cheaply with a 911 and a bad car could quickly land you multiple five-figure bills if you’re doing a proper job of it. Choose carefully, seek expert advice where possible and scrutinise every last bit of the history for a sense of what you’re getting into.

Is the 911 G-Series classed as a classic car for vehicle insurance, and why?

Yes, the G-Series is firmly a classic car and really benefits from classic car insurance. Even the youngest examples are now more than 35 years old, and the model is one of the defining air-cooled 911 generations.

It is also valuable, enthusiast-owned and highly specification-sensitive. A 911 SC, Carrera 3.2, Turbo, Targa, Cabriolet or factory wide-body car can sit in very different value brackets. Originality, mileage, condition, history and restoration quality all matter. That makes agreed-value classic insurance far more appropriate than a standard market-value policy.

How much does it cost to insure a Porsche 911 (G-Series)?

There is no reliable single figure for classic car insurance on a Porsche 911 G-Series, since there are so many different aspects which will influence the price.

Here at Goodwood Classic Solutions, we offer specialist classic Porsche insurance from just £115 per year, so give our expert team a call on 01243 913 333 to speak to us about your options, or get a quote online now.

A G-Series 911 should ideally have specialist cover with agreed value, salvage retention, limited mileage options and access to suitable repairers. Standard insurance may not properly reflect the car’s air-cooled Porsche market value, originality, restoration quality or the cost of correct repairs.

How do the condition, modifications and how the Porsche G-Series is used affect insurance premiums?

Condition affects the value of your vehicle, which directly impacts how much you’ll pay to insure your G-Series.
A concours, low-mileage Carrera 3.2 or Turbo may be worth far more than a driver-quality SC, so the policy must reflect the real market value. Poor condition may reduce value, but visible corrosion or weak history can also make the car harder to insure accurately.

Modifications should be declared when you’re taking out your insurance policy, to avoid having any problems later on if you ever need to make a claim. These modifications are rarely a problem, since we offer modification cover on most of our policy.

Use matters, too. Limited-mileage weekend use, garaging and strong security can help, especially with a limited mileage discount. On the other hand, things like regular commuting, street parking, European tours, rallies, business use or track days may require specific cover and can increase the premium. The key is to insure the car for how it is actually used.

You can call our team here on 01243 913 333 for more information, or get a quote online now, to see how much we can save you on 911 G Series insurance.

Who is the Porsche 911 G-Series recommended for?

The G-Series is great for buyers who want the classic air-cooled 911 experience in a car that can still be used and enjoyed. It suits enthusiasts who appreciate mechanical feel, compact size, originality and Porsche history.

It is not ideal for bargain hunters or anyone expecting modern refinement. Buy carefully, budget properly and use specialists. A good SC or Carrera 3.2 can be a superb long-term classic; a rusty or poorly repaired car can be ruinously expensive.

What are the most popular specifications for the G-Series Porsche 911?

The 3.2 Carrera is one of the most popular choices, especially 1987–1989 cars with the G50 gearbox. They combine classic looks with strong performance, Bosch Motronic injection and good usability.

The 911 SC is also popular because it is robust, characterful and often a little more attainable. Targas appeal to buyers who want open-air driving without a full Cabriolet, while Coupés are usually the purist choice.

At the top end, Turbos, factory wide-body cars, limited editions and low-mileage original examples command strong money. For most buyers, the best car is a well-maintained SC or Carrera 3.2 with documented history and sound bodywork.

Which G Series model to choose?

For years a forgotten model word is now out about the early mechanical fuel injection 2.7 Carreras, which basically ran the engine from the legendary 2.7 RS. These are now sought-after and valuable, the 3.0-litre ‘Carrera 3’ that replaced it in 1975 also highly regarded. The range was updated with a new 3.0-litre engine for the SC in 1978, emissions regs meaning it was actually down on power, though this was steadily addressed and balance restored by the early 1980s.

The big change came in 1984 with the introduction of the bigger, torquier 3.2-litre engine and, in 1987, the sturdier ‘G50’ gearbox. If you want a more modern feeling car these late versions have obvious appeal, though appreciation of the SC’s lighter, revvier nature has grown among purists and, if it was our money, an early ‘80s one with the 204PS (150kW) 3.0-litre engine, no wing and on Fuchs wheels would be top of the wishlist.

Targas and convertibles remain popular but, while they can be a bit more affordable to buy, they’ll be no cheaper to restore or run so the coupe remains the more desirable bodystyle.

Specifications – 1981 Porsche 911 SC 3.0

Engine

3.0-litre six-cylinder, petrol

Power

204PS (150kW) @ 5,900rpm

Torque

267Nm (197lb ft) @ 4,300rpm

Transmission

Five-speed manual, rear-wheel drive

Kerb weight

1,160kg

0-62mph

6.8 seconds

Top speed

146mph

Production dates

1978-1984 (entire G-Series production 1974-1989)