All internal combustion engines produce the same outcome...fuel explodes, moves a piston(s) which causes a crankshaft to turn and make the car, van, ship or plane  etc. move...

In spite of this there are many differences in the way that engines function. Here are some of the differences:

Aircooled and Watercooled

2 stroke and 4 stroke

Overhead valve and Overhead cam

Diesel and Petrol

Carburettor and Fuel injection and so on.
Generally speaking the greatest advances in how the modern engine functions have been in the use of electronic controls. These have resulted in improvements in fuel consumption, power output, emmisions and so on.

Andy Hewing
26th November

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