OK, so the Williams FW15C isn't exactly forgotten. Campaigned during the 1993 season it was the car in which French driver Alain Prost won his fourth and final Formula 1 world championship. Packed with a plethora of driver aids (active suspension, ABS brakes, traction control, telemetry, fly-by-wire controls, pneumatic valve springs, power steering and a semi-automatic transmission) it also remains the most advanced F1 car ever built.
So what gives? Well take a rummage through the sport's history books and you'll discover that Williams built a special test-mule version of the FW15C that was fitted with a continuously variable transmission (CVT). Sounds strange, I know, but apparently this modification let the 3.5-litre Renault V10 operate at its peak efficiency more of the time.