The Marcos Mantaray was an evolution of the Marcos GTS. Power for the Mantaray came from a variety of sources including a 4.0 litre and 4.6 litre Rover V8 as well as a 2 litre 4cylinder Rover unit.

Only 11 Mantaray's were made with the 4.0 litre engine, and seven with the 4.6 litre engine.