2009 BMW 635 vs. 2013 BMW 7 Series
To start off, 2013 BMW 7 Series is newer by 4 year(s). Which means there will be less support and parts availability for 2009 BMW 635. In addition, the cost of maintenance, including insurance, on 2009 BMW 635 would be higher. At 2,993 cc (6 cylinders), 2009 BMW 635 is equipped with a bigger engine. In terms of performance, 2013 BMW 7 Series (311 HP @ 5800 RPM) has 29 more horse power than 2009 BMW 635. (282 HP @ 4400 RPM) In normal driving conditions, 2013 BMW 7 Series should accelerate faster than 2009 BMW 635.
Both vehicles are rear wheel drive (RWD) - it offers better handling in dry conditions; in addition, if you are looking to drift, both vehicles do the job better than front wheel drive vehicles. 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 635 (580 Nm @ 1750 RPM) has 133 more torque (in Nm) than 2013 BMW 7 Series. (447 Nm @ 4500 RPM). This means 2009 BMW 635 will have an easier job in driving up hills or pulling heavy equipment than 2013 BMW 7 Series.
Compare all specifications:
| 2009 BMW 635 | 2013 BMW 7 Series | |
| Make | BMW | BMW |
| Model | 635 | 7 Series |
| Year Released | 2009 | 2013 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 2993 cc | 2979 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 282 HP | 311 HP |
| Engine RPM | 4400 RPM | 5800 RPM |
| Torque | 580 Nm | 447 Nm |
| Torque RPM | 1750 RPM | 4500 RPM |
| Engine Bore Size | 84 mm | 84 mm |
| Engine Stroke Size | 90 mm | 89 mm |
| Engine Compression Ratio | 17.0:1 | 10.2 :1 |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 250 km/hour | 250 km/hour |
| Acceleration 0-100mph | 6.6 seconds | 5.6 seconds |
| Drive Type | Rear | Rear |
| Transmission Type | Automatic | 8-speed automatic |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Length | 4830 mm | 5214 mm |
| Vehicle Width | 1860 mm | 2134 mm |
| Vehicle Height | 1380 mm | 1481 mm |
| Wheelbase Size | 2790 mm | 3210 mm |
| Fuel Tank Capacity | 70 L | 80 L |
