The Chamberlain 8, 2 stroke, 4 cylinder, 8 pistons... and front wheel drive.

it did indeed have eight pistons but one set operated as valves, albeit with some contribution to compression; much like a compressor. The two pistons per cylinder design allows quite independent timing of the inlet and exhaust ports-thereby overcoming one of the inherent shortcomings of a normal one piston per cylinder two stroke design. The top crankshaft is actually timed 27.5 degrees behind the lower crankshaft. This allows the intake ports to remain open after the exhaust closes, to take advantage of the higher blower pressure-which then can actually pressurise the ingoing gases in the cylinder. [video4]