The GM TPC (Two-Person Commuter) was a concept car built in 1982.
It is the lightest car built by General Motors, weighing just 1.070 pounds. Contributing to the car's low weight were the doors, front end, and rear fenders, all of which were aluminum. There were no sharp body lines, everything was smooth and curved, including the side windows, which 'ballooned" outwards.
The rear view minors were placed inside the car to keep with the smooth-line theme. GM claimed that the TPC's superb aerodynamics could allow it to achieve 95 miles per gallon on the highway and 68 miles per gallon in congested city traffic.
The sleek design produced little airstream turbulence, causing the car to achieve a drag coefficient of 0.31. The tires were flush with the wheelhouse and the glass was flush with the bodywork, contributing to the car's aerodynamic success.
The TPC was powered by a small 0.8-litre three-cylinder engine coupled with a five-speed manual transmission and incorporated a four-gallon fuel tank.