Jay Leno Drives 1924 Bentley Twin Turbo [Video]
The car started its life as a 4.5-liter race car, presumably on a 3-liter chassis. Jay’s team then put the 8-liter engine from the saloons into the tiny chassis, and then they slapped a couple of turbos on.
Of course, turbos were not available back in the day, so lots of parts had to be hand fabricated. Jay says the car now has 400 to 450 horsepower and as much as 900 lb-ft of torque. As you’d expect, that much power translates into lots of heat as well. The engine is essentially oil-cooled, and has a whole other radiator added to the underside.