Bentley 3-litre

BUYER’S GUIDE

Bentley 3-litre review

Bentley’s first car, the 3-litre’s combination of speed, luxury and engineering quality set the tone the brand lives by to this day…

What Is It?

Nothing less than Bentley’s origin story in one car, the 3-litre was first shown in October 1919 as a statement of intent for the car company W.O. Bentley started that same year. Powered by a technically advanced and tough four-cylinder engine, it immediately impressed for its engineering, luxury and speed, with the firm guaranteeing it would comfortably lap Brooklands four-up at 75mph.

More highly tuned Green Label versions later guaranteed to a genuine 100mph. Victory at the 1924 Le Mans was the perfect demonstration of the 3-litre’s performance and durability, and the opening chapter in a story that has become the stuff of legend. If not a classic for the faint of heart (or wallet), a 3-litre is genuinely an icon of British motoring history, perhaps even broader national identity.

Corrosive Areas

Chassis rails

Suspension mounts

Bodywork (depending on type)

Checklist

  • Launched in 1921 as ‘The Three Litre Bentley – A British Thoroughbred Car’, all were sold as bare chassis onto which coachbuilt bodywork of the buyer’s choice was then fitted
  • Open-top Vanden Plas four-seater is the iconic look, but Weymann saloons also popular
  • Early cars had single carburettors and rear-wheel brakes only, four-wheel braking added from 1924 while twin SU carburettors improved performance
  • A total of 1,622 3-litres were built, making it by far the most numerous of Bentley’s early era
  • Three main versions were built, the standard Blue Label available in two wheelbase lengths the most numerous, the Red Label Speed featuring extra power and the shorter wheelbase, while the Green Label used a shorter wheelbase still and was manufactured in tiny numbers
  • Mercedes-inspired engine featured a complex ‘monoblock’ casing, four-valves per cylinder, twin-spark ignition and a gear-driven single camshaft
  • The motor is famed for its toughness and performance, but demands dedicated and frequent maintenance by experts
  • While few 3-litres will now rack up big miles, lubrication and upkeep for its various mechanical parts is a regular requirement — make sure any prospective purchase has been looked after with suitable rigour
  • Body on frame construction at least means few places for rust to hide and most cars will now lead cosseted lives, but don’t be complacent when checking for corrosion, dodgy repairs or bodged restorations
  • Similarly, body construction will vary according to coachbuilder and require specialist attention if repairs or restoration are needed
  • While many cars have well-documented histories, a good number will have been restored, rebodied, repainted or otherwise modified numerous times over their lives
  • As such, if you’re paying over the odds for a Red Label Speed or even a Green Label make absolutely sure the car is what it is claiming to be, not a recreation

How does it drive?

Even the youngest 3-litre is now knocking on 100 years old, and much of the design dates back to before the World War I. Suffice to say, this isn’t a car you just jump in and drive like a more modern classic but demanding of a level of physicality to make it go and also mechanical finesse if you’re to master the notoriously tricky four-speed crash gearbox and centre throttle.

Thankfully, the engine is famously torquey and tractable, so you won’t need to be up and down the gears too much. For a century-old car, performance is still respectable as well, and you won’t be left for dead as you might in others of this vintage. Just leave a little more space for braking, the 3-litre only getting drums on all four wheels from 1924 onwards and, even then, taking some stopping!

What’s good?

Iconic is a much over-used word, but even the least car-literate individual would probably recognise a 3-litre Bentley, and everything it stands for. Arguably a little less brutish than the bigger and more powerful cars that followed, the classic open top touring bodywork combines sporting vibes with traditional luxury, while saloons slip a little more under the radar and have an old-money charm evoking Roaring 20s nights on the town and weekend parties at the country estate.

Seemingly every car has a tale to tell, with successions of senior military men, film stars, society figures and royalty on the logbooks, many of whom got up to all manner of high jinks along the way. Preserving and even adding to this legacy yourself is all part of the pleasure, and hardier owners take great delight in still using the cars as intended. Legendary sporting success from the start and its leading role in Bentley’s Le Mans story just adds to the appeal.

What’s bad?

We’re in properly rarified territory here, and you don’t just blunder into Bentley ownership on a whim. While the 3-litre is by far the most numerous of the classic ‘20s Bentleys they’re still very collectable, and the ones with the really interesting backstories or highest levels of originality will be highly prized. And priced accordingly. This also opens the door to the chancers and also-rans riding on the coat tails, and separating fact from a century’s accumulated fiction will take some legwork.

It also means many will have been through numerous makeovers and rebirths, with engine swaps, modifications, completely new bodies and more. So, make sure any exotic claims about motorsport success or famous former owners can be verified, if such things matter to you. It goes without saying driving, owning and running a Bentley of this vintage takes some dedication, too.

 

Which model to choose?

There are obvious temptations in chasing a classic open top tourer in traditional British Racing Green, though it’s safe to say there are many more 3-litres in this configuration now than there ever were in period! Some might see it as bordering on cliché. Widening the net to other body styles — saloons included — may uncover cars with more interesting histories than those simply cosplaying as Le Mans winners, and see your money go a little further.

If you’re chasing true matching numbers originality, be prepared to do your research and be absolutely sure before laying down the extra cash… or just accept many will now have lived several lives over the last hundred years and simply choose the one with the best combination of condition and looks for your tastes and budget!

Specifications – Bentley 3-litre Red Label Speed

Engine

3.0-litre four-cylinder petrol

Power

81PS (110kW) @ 3,500rpm

Torque

N/A

Transmission

Four-speed manual, rear-wheel drive

Kerb weight

N/A

0-62mph

N/A

Top speed

90mph

Production dates

1921-1929 (all variants)