Re: Top Speed DodgeMS-4, I don't recall BMW ever competing in the Can-Am series. If they did, they didn't last long or were simply non-competitive (and thus forgotten about) as Can-Am was dominated by Porsche (the most dominant), Chaparral, Lola, and McLaren. From a lot of your other posts (in other threads mostly), it seems that you are either a BMW nut, a McLaren nut, or both. Nothing wrong with that, but you seem to come across as saying that BMW engines are the best thing since sliced bread. You should note that most of the teams competing in the Can-Am series used large Chevrolet V8's. Including McLaren (although their first year utilized an Oldsmobile V8). The 1,200 hp Can-Am engines belonged to Porsche and those engines were 5.4-liter flat-12's. Check out the following links: http://www.cknet.org.uk/html/specification.htm http://www.vintagerpm.com/can-am_history.htm The BMW engine you speak of sounds more like a Formula 1 engine from the turbo era ( http://www.f1-grandprix.com/history5.html) where manufacturers were indeed making in excess of 1200 hp with 1.5-liter engines running on exotic (and VERY toxic) fuels and pushing very large amounts of boost. The problem I have with you calling the W16 pathetic and then comparing the engine with racing engines is that the reality of building a race car and the reality of building a road-going car are very different, especially when we start talking about the drivetrain. Sure, you can make 1,000 hp per liter from a small, turbocharged, high-revving engine, but how suitable is that engine going to be in a road car where at least some low end torque is required and must last at least 100,000 miles? As I said before, the engine wouldn't need the turbochargers to make its 987 hp from 8 liters (123 hp/L is still pretty impressive for a road-going car), it utilizes the turbos to enhance low and midrange torque (like the current VW/Audi, Saab, and Volvo turbo engines). Horsepower per liter is not the end-all-be-all of engine design, nor does it tell you much about an engine's efficiency.