Alfa Romeo Giulia vs Cadillac CT4: Specs Compared

Running cost over five years: at the EPA's 15,000-mile-a-year assumption the Alfa Romeo Giulia burns about $2,800 of fuel annually against $2,800 for the Cadillac CT4. That $0 yearly gap compounds to roughly $0 over five years and $0 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 versus highway split: the Alfa Romeo Giulia is the stronger commuter at 24 mpg city, while the Cadillac CT4 pulls ahead on the interstate at 34 mpg highway. If most of your driving is stop-and-go traffic the city figure is the one to weigh; for long-distance highway mileage the reverse is true, and the two vehicles effectively swap places depending on how you drive.

Powertrain choice: the Alfa Romeo Giulia is recorded with 1 distinct engine configuration (SIDI), the Cadillac CT4 with 1 (SIDI). Across 28 recorded Alfa Romeo Giulia configurations and 52 for the Cadillac CT4, the wider the engine spread the more the real-world fuel efficiency depends on which version you actually buy, so check the specific model year and drivetrain rather than the headline number.

Drivetrain and class: the Alfa Romeo Giulia is offered with All-Wheel Drive, Rear-Wheel Drive, the Cadillac CT4 with All-Wheel Drive, Rear-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 Midsize Cars and Compact Cars respectively — the class drives the interior volume, cargo space and passenger space each one is measured against.

Tailpipe emissions: at their cleanest configurations the Cadillac CT4 emits 327 g/mile of CO2 versus 330 g/mile for the Alfa Romeo Giulia. Emissions track fuel consumption almost exactly, so the cleaner vehicle here is also the cheaper one to fuel.