2009 BMW 650 vs. 2007 Cadillac STS
To start off, 2009 BMW 650 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Cadillac STS. In addition, the cost of maintenance, including insurance, on 2007 Cadillac STS would be higher. At 4,799 cc (8 cylinders), 2009 BMW 650 is equipped with a bigger engine. In terms of performance, 2009 BMW 650 (361 HP @ 6300 RPM) has 107 more horse power than 2007 Cadillac STS. (254 HP @ 6500 RPM). In normal driving conditions, 2009 BMW 650 should accelerate faster than 2007 Cadillac STS. With that said, vehicle weight also plays an important factor in acceleration. 2007 Cadillac STS weights approximately 257 kg more than 2009 BMW 650.
Because 2007 Cadillac STS is four wheel drive (4WD), it will have significant more traction and grip than 2009 BMW 650. In wet, icy, snow, or gravel driving conditions, 2007 Cadillac STS will offer significantly more control. With that said, do keep in mind that many other factors such as speed and the wear on your tires can also have significant impact on traction and control. Let's talk about torque, 2009 BMW 650 (488 Nm @ 3400 RPM) has 146 more torque (in Nm) than 2007 Cadillac STS. (342 Nm @ 3200 RPM). This means 2009 BMW 650 will have an easier job in driving up hills or pulling heavy equipment than 2007 Cadillac STS. 2007 Cadillac STS has automatic transmission and 2009 BMW 650 has manual transmission. 2009 BMW 650 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Cadillac STS will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 BMW 650 | 2007 Cadillac STS | |
| Make | BMW | Cadillac |
| Model | 650 | STS |
| Year Released | 2009 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 4799 cc | 3556 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 361 HP | 254 HP |
| Engine RPM | 6300 RPM | 6500 RPM |
| Torque | 488 Nm | 342 Nm |
| Torque RPM | 3400 RPM | 3200 RPM |
| Engine Bore Size | 93 mm | 94 mm |
| Engine Stroke Size | 88.3 mm | 85.6 mm |
| Engine Compression Ratio | 10.5:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Top Speed | 250 km/hour | 229 km/hour |
| Drive Type | Rear | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1525 kg | 1782 kg |
| Vehicle Length | 4830 mm | 4990 mm |
| Vehicle Width | 1380 mm | 1850 mm |
| Vehicle Height | 1860 mm | 1470 mm |
| Wheelbase Size | 2790 mm | 2960 mm |
| Fuel Consumption City | 16.8 L/100km | 13.1 L/100km |
| Fuel Consumption Overall | 9.3 L/100km | 12.4 L/100km |
| Fuel Tank Capacity | 70 L | 66 L |
