Top speed: 8 of 8 variants rated.
Cadillac STS-V 4.4 V8 Supercharged tops the Cadillac STS ranking by Top speed, at 250 km/h (155 mph).
Across 8 ranked variants, Top speed spans from 229 km/h (142 mph) to 250 km/h (155 mph).
| # | Variant | Year | Body | Fuel | Top speed |
|---|---|---|---|---|---|
| 1 | Cadillac STS-V 4.4 V8 Supercharged | 2007 | Sedan | Petrol | 250 km/h (155 mph) |
| 2 | Cadillac STS 4.6 V8 AWD Sport Luxury | 2006 | Sedan | Petrol | 250 km/h (155 mph) |
| 3 | Cadillac STS 4.6 V8 Elegance | 2005 | Sedan | Petrol | 250 km/h (155 mph) |
| 4 | Cadillac STS 4.6 V8 Launch Edition | 2005 | Sedan | Petrol | 250 km/h (155 mph) |
| 5 | Cadillac STS 4.6 V8 Sport Luxury | 2005 | Sedan | Petrol | 250 km/h (155 mph) |
| 6 | Cadillac STS 3.6 V6 Elegance | 2005 | Sedan | Petrol | 229 km/h (142 mph) |
| 7 | Cadillac STS 3.6 V6 Launch Edition | 2005 | Sedan | Petrol | 229 km/h (142 mph) |
| 8 | Cadillac STS 3.6 V6 Sport Luxury | 2005 | Sedan | Petrol | 229 km/h (142 mph) |