The Mercedes-Benz OM617 5-cylinder diesel is quite the engineering marvel, but we mustn't forget that Mercedes-Benz also made one of our favorite V8s of all time.
The single-overhead-camshaft M100 started out in 1963 with a displacement of 6.3 liters, or about 384 cubic inches, but that's not the engine we talk about when we're on the subject of the M100. No, it's the powerplant used in the mighty 450SEL 6.9 that we refer to here. You got sodium-filled valves, a dry-sump oiling system, and more than 400 foot-pounds-o-torque with the 6.9… and those of you on a budget can find a totally affordable 6.9!
[Wikipedia]
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