Overall score out of 100: 78. Reliable, roomy interior, "Ho-Hum engine" with excellent mileage. The Corolla is a smart purchase that won't let you down. Number One? Chevy Impala. Overall score: 86. I'll stick with Corolla. Impala's a pretty big vehicle, which is okay, but the Corolla got 32 mpg combined, the Impala 22 mpg combined. But i would love a Corolla with a small 6 cylinder engine in it...Heh Heh!