1990–1991 Cadillac Seville STS Specs & Performance

The 1990–1991 Cadillac Seville STS is a large luxury sedan built around a naturally aspirated 4.9-liter V8, producing 201 hp and 275 lb-ft of torque. Front-wheel drive and a 4-speed automatic transmission accompany an 8.5-second 0–60 mph time and 115 mph top speed, while the OHV 16-valve engine delivers its peak power at 4,100 rpm and peak torque at 3,000 rpm. Its 3,660-pound curb weight gives the Seville STS an 18.21 lb/hp power-to-weight ratio.

The sedan combines a spacious five-seat cabin with 14.1 ft³ of luggage capacity and a substantial 18.8-gallon fuel tank. MacPherson struts are used at both ends, with disc brakes and 215/60R16H tires supporting its road-going character. Measuring 190.6 inches long with a 108.1-inch wheelbase, the Seville STS has a 70.9-inch width and 53.9-inch height. With 19 mpg combined economy and a 356-mile total range, its configuration balances traditional V8 performance with the comfort and practicality expected from a full-size Cadillac sedan.