The third-generation RX-7 arrived in 1991. Mazda used the compact rotary engine to pursue a light, balanced sports car. Unlike a conventional piston engine, a rotary uses rotating elements: the appeal here is a different engineering route, not an invented reliability advantage.

The FD earns fifth because that unusual design gives the list a distinct alternative to its straight-sixes. We favour the LFA’s engineering ambition above it, but rotary enthusiasts have a strong case to disagree. Mazda’s 1991 Le Mans victory belonged to the 787B, not this road car.

Source: Mazda · Photo: Aaron Lai · CC BY 2.0. Resized/recompressed; image retains source license.