This is an original 1948 Tucker engine, the Tucker 48 is undoubtably one of the most famous low-production number cars of the 20th century and it was powered by a re-purposed 5.5 litre helicopter engine.

The car was made famous in mainstream society thanks to the film Tucker: The Man and His Dream by Francis Ford Coppola, starring Jeff Bridges, Joan Allen, and Martin Landau.

The original engine specifications that Preston Tucker had wanted for the Tucker 48 included a flat-6 configuration, liquid-cooling, all-aluminum alloy construction, and 150 hp. This was a significant horsepower figure for the era.

Tucker 48 Car 1

Above Image: Preston Tucker’s personal Tucker 48 – Used here to show what the Tucker 48 looks like.

Development of the prototype engines proved fraught with issues, development was eventually abandoned and a new engine was sought. The air-cooled Bell 47 helicopter engine designed and manufactured by the somewhat unimaginatively named Air Cooled Motors (originally the Franklin Engine Company).

The Air Cooled Motors Franklin O-335 engine was an aluminum flat-6 capable of 166 hp, it has a capacity of 334 cubic inches (5,470cc) and it was air-cooled.

The Tucker engineers made the decision to convert it to liquid-cooling which has puzzled automotive historians ever since, they succeeded however, and this would be the engine used in the 50 or so production Tucker 48 cars before the company closed its doors.

A Tucker '48 Sedan design patent illustration

Above Image: An original patent filing for the Tucker 48.

The engine you see here was built at the Tucker factory though it’s clearly been rebuilt in recent years back to its original external specification including the eye-catching red “Tucker” lettering on the intakes.

The engine is due to come up for sale with RM Sotheby’s in mid-August and there’s currently no estimated price listed.

It’s difficult to know what the engine could be used for, though it would make an excellent candidate if anyone decided to build Preston Tucker’s “Carioca”. This was to be Tucker’s next car after the Tucker 48, it was more sporting and it was funded by a team of Brazilian’s who worked with Preston in the early 1950s.

If you’d like to read more about this engine or register to bid you can click here to visit the listing.

Tucker 48 Engine Intake

Tucker 48 Engine Intake 2

Tucker 48 Engine Carburetor

Tucker 48 Engine 1

Tucker 48 Engine Engine In Car 2

Above Image: A different Tucker 48 engine – fitted here to Preston Tucker’s 48.

Engine + Tucker 48 Images: Darin Schnabel ©2018 Courtesy of RM Sotheby’s

Founder + Senior Editor

Ben Branch has had his work featured on CNN, Popular Mechanics, the official Smithsonian Magazine, Road & Track Magazine, the official Pinterest blog, the official eBay Motors blog, BuzzFeed, and many more.

Silodrome was founded by Ben back in 2010, in the years since the site has grown to become a world leader in the alternative and vintage motoring sector, with millions of readers around the world and hundreds of thousands of followers on social media.

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