Only two car manufacturers have boxer engines and permanent 4WD - Porsche and Subaru. And only Subaru has these as standard across all models. The combination oozes ample amounts of grip on all surfaces and lowers the centre of gravity of the vehicle, so stability in cornering is exemplary, setting the benchmark for both performance-oriented vehicles and those venturing off-road. Subaru goes one step further by bolting on a turbocharger in the WRX, WRX Sti and beefed up variants of its Forester SUV. This is tech derived directly from World Rally Championships, where the company had continual success in the 1990s.