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The last M5 before the E39, the E34, used a 3.8-liter six-cylinder engine with 340 horsepower. However, it had reached its development limit, so BMW began exploring other options for use in the ...

As BMW tells us, the E39 M5 almost stuck with the six-cylinder engines that had always powered its performance models. It even considered a turbocharged V6 instead of a V8 or its classic inline-6.

The E39 generation of the BMW M5 is well-known today for its powerful V8 engine and manual transmission, but it almost wasn't so cool.