Interesting. The SLR gains 33% more mileage over the veyron, which is interesting in that its engine has a max output of 626hp.....while the veyron is 1001....so its about 30ish % less hp.....thus the 1 extra mpg. Thats weird! 
Diesels rock. I've thought about how much electricity is required just to keep a dumb gasser going.....on a M103 its like 20 amps @ 12 volts....thats crazy. 9-10amps for the fuel pump(s).....ignition coil/computer/injection is another 7-10 amps......so inefficient.
A diesel only needs to keep its injection/lift pump moving...far less energy use/loss.
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-diesel is not just a fuel, its a way of life- 
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