For Volvo, it also seemed natural to base our design work on a successor to the F10/F12/F16 range, as it was obvious that we needed to start planning for a completely new generation of engines to succeed the 12-litre engine. The development of a radical new engine, the "D12", began. For the first time in Europe, a heavy-duty diesel engine featured principles previously found mainly in advanced sports car engines, including an overhead camshaft and four valves per cylinder.