Nissan brought the first, and only, variable-compression engine to market. But its future doesn't look bright. Complexity in cars is a funny thing. It’s tempting to say that it’s all bad, that more is ...

In a conventional piston engine, the compression ratio defines the relationship between the largest and smallest volume of a cylinder - when its piston is at bottom dead centre and top dead centre ...

Tim oversees the digital teams that bring you CAR magazine and Parkers, our car-buying sister website. A lifelong motoring journalist, he has worked at many of the UK's biggest car titles, including ...