Negotiable
96 to 98 US with 4.0-litre engines had the same displacement as the 3.9-litre engines fitted to the earlier 94 to 95 US
the differences between the engines involved improvements to the block rigidity and pistons,
and a change from the Lucas 14CUX engine management to the distributor-less Generic Engine Management System ("GEMS").
In earlier 3.9-litre US engines the fuel injection computer (14CUX) did not control the ignition,
which was instead controlled by a traditional system with an ignition coil and distributor made by Lucas.
GEMS system was developed jointly by Lucas and SAGEM;
it controlled both spark timing and fuel injection.
Unlike the earlier systems fitted to Rover V8 engines