The SQ5 TDI accelerates from 0–62 mph in 5.1 secs, and is electronically limited to 155 mph. This is comparable to rival range-topping performance SUVs with diesel engines, such as the Porsche Cayenne S Diesel (0–60 mph: 5.7 s) and BMW X5 M50d (0–60 mph: 5.4 s), and also to high-performance petrol-powered SUVs, such as the Mercedes-Benz ML63 AMG (0–60 mph: 4.8 s), Porsche Cayenne Turbo S (0–60 mph: 4.1 s). These listed rivals are all larger and heavier, falling into the mid-size SUV class, and, as such, command significantly higher asking prices. A more realistic comparison may be made with the BMW X3 xDrive35d, which delivers slightly better economy (46.3 mpg to the SQ5's 41.5), though slightly lower performance (0–62 mph: 5.8 s, max speed: 149 mph).