Originally Posted by GhostRideTheWhip
Cars in 1986 didn't get to 60 on 3.9 seconds.
1989 Supercars did.
The Porsche 959 and the higher performance variations of the Lamborghini Countach were also sub 4 second 0-60 cars from 1986.
Some cars from the 1960s (notably the Ford GT40 and the Cobra Daytona Coupe) were also sub 4 second 0-60 cars. I suppose an argument could be made that they were really race cars but there were street legal versions sold and I would consider them the supercars of their era.