Cadillac XT5 vs Porsche Cayenne

The short version

The Cadillac XT5 is more fuel-efficient: 24 vs 19 MPG combined in its best version.

That works out to about $1,150 a year less in fuel for the Cadillac XT5 (EPA estimate, 15,000 miles).

The Porsche Cayenne is the bigger car, about 4 inches longer.

Across all model years since 2005, the Cadillac XT5 has had fewer recall campaigns (15 vs 28).

The two cars

The 2026 Cadillac XT5 is a small SUV offered with 2 engines (2.0L 4-cyl turbo and 3.6L 6-cyl) and front-wheel drive and all-wheel drive. It measures about 190 inches long and 75 inches wide on a 113-inch wheelbase, with a curb weight of roughly 4,277 lb (4dr SUV AWD).

The 2026 Porsche Cayenne is a standard SUV offered with 2 engines (3.0L 6-cyl turbo and 4.0L 8-cyl turbo) and all-wheel drive. It measures about 194 inches long and 78 inches wide on a 114-inch wheelbase, with a curb weight of roughly 4,376 lb (Base / S 4dr SUV).

Buying used? The 2021 XT5 and the 2018 Cayenne have the fewest problems in our data; avoid the 2017 XT5 and the 2019 Cayenne.