The BMW M4 goes head-to-head with the BMW M5 in a quarter-mile drag race, comparing two performance cars from BMW’s M lineup with very different sizes, power delivery, and driving character. This ...

Which is quicker in a straight line between the plug-in hybrid M5 Touring and the internal combustion-only RS 6 Avant Performance? On paper, the Audi has the upper hand to 60 miles per hour (97 ...