The Lotus Carlton may be a hero car today, but it was not an unqualified success in its time. Its bespoke engineering was expensive, not least the engine rebuild that gave it new pistons, conrods and ...

A hundred years ago, Opel launched its first four-valve per cylinder engine in the 1913 Grand Prix Car, paving the way for a series of four-valve engines that today are more present than ever in the ...

The Opel Lotus Omega is one of the wildest four-door sports sedans ever created. With some 377 hp (281 kW) on tap and a top speed north of 175 mph (281 km/h), it was an absolute monster when it ...

A hundred years ago, Opel developed it’s first engine utilizing four valves per cylinder for use in the 1913 Grand Prix racing car. Little did they know at the time that this innovative technology ...