2.5 Litre Triumph ...
In May 1971 the 2.5 Triumph engined Marcos was introduced. Using the 2.5 carburettor engine as fitted in the Triumph 2.5 Saloon car, and the same Triumph gearbox as in the Mantis but without an overdrive.
This engine was used as an alternative to the Volvo power unit purely for financial reasons.
The car was externally identical to the 3 Litre Volvo, and only 12 of these cars were produced making it a fairly rare model.