Audi e-tron S vs Ford Mustang Mach-E: Specs Compared

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Ford Mustang Mach-E burns about $700 of fuel annually against $1,000 for the Audi e-tron S. That $300 yearly gap compounds to roughly $1,500 over five years and $2,400 over eight — often more than the price difference between two trims of the same vehicle, and the single largest running-cost line item separating these two.

City and highway economy: the Ford Mustang Mach-E leads in both cycles — 115 mpg city and 104 mpg highway against 73 and 78 mpg — so its fuel-efficiency advantage holds whether you commute in traffic or cover long highway miles.

Drivetrain and class: the Audi e-tron S is offered with All-Wheel Drive, the Ford Mustang Mach-E with Rear-Wheel Drive, All-Wheel Drive. All-wheel drive typically costs one to two mpg combined against the same vehicle in front- or rear-wheel drive, which is worth remembering when the gap between these two is small. The EPA classes them as Standard Sport Utility Vehicle 4WD and Small Sport Utility Vehicle 4WD respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.