On the surface, it would be difficult to find two machines that share less in common than the 2009 Porsche 911 and the latest Ski-Doo MX Z X snowmobile. But dig a little deeper (into their engine bays) and things start to show a few similarities, most notably the use of direct injection. After taking a little detour explaining how direct injection came about in Germany during World War II, the scribes at Winding Road put the two DI machines up against each other for some impromptu non-instrumented drag racing.