Audi touts the S5’s “all-wheel-drive clutch” as well as the new model’s reduction in carbon emissions against the old, and ...

while the S5 gets either 19-inch or 20-inch wheels with summer or run-flat tires. The aesthetics of the new A5 are what Audi is proudest of. For starters, it's 2.6 inches longer, 0.5 inches wider ...