Audi A3 sedan concept Engine five-cylinder engine that uses turbocharging and FSI to pump out 408 horsepower. Peak torque measures 368 pound feet, and all that power is available between 1,600 and 5,300 rpm. Audi claims its A3 sedan concept can hit 62 mph in 4.1 seconds and is electronically governed to a top speed of 155 mph.
