Both engine options in the 2012 Audi A3 are fuel efficient but when it comes to mileage supremacy, the 2.0-liter TDI diesel is the way to go. The diesel-powered A3 will get you an EPA-rated mileage of 30/42 mpg city/highway or 34 mpg combined, which is comparable to some hybrid models. In real world testing our editors have seen more than 45 mpg in long-haul interstate cruising and even low 30s in stop-and-go situations.
If you have to live with gasoline the regular 2.0-liter engine will still impress you with its economy. In its most fuel efficient front-wheel drive setting with the S tronic gearbox, you’ll get 22/28 mpg city/highway or 24 mpg combined. Opting for the quattro all-wheel drive will only see your city mileage drop 1 mpg so we recommend you add this feature for its extra safety and performance.