2007 Audi S4 vs. 2005 BMW 645
To start off, 2007 Audi S4 is newer by 2 year(s). Which means there will be less support and parts availability for 2005 BMW 645. In addition, the cost of maintenance, including insurance, on 2005 BMW 645 would be higher. At 4,390 cc (8 cylinders), 2005 BMW 645 is equipped with a bigger engine. In terms of performance, 2007 Audi S4 (341 HP @ 7000 RPM) has 3 more horse power than 2005 BMW 645. (338 HP @ 6100 RPM). In normal driving conditions, 2007 Audi S4 should accelerate faster than 2005 BMW 645.
Let's talk about torque, 2005 BMW 645 (439 Nm @ 3600 RPM) has 29 more torque (in Nm) than 2007 Audi S4. (410 Nm @ 3500 RPM). This means 2005 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi S4.
Compare all specifications:
2007 Audi S4 | 2005 BMW 645 | |
Make | Audi | BMW |
Model | S4 | 645 |
Year Released | 2007 | 2005 |
Body Type | Sedan | Coupe |
Engine Position | Front | Front |
Engine Size | 4163 cc | 4390 cc |
Engine Cylinders | 8 cylinders | 8 cylinders |
Engine Type | V | V |
Valves per Cylinder | 5 valves | 4 valves |
Horse Power | 341 HP | 338 HP |
Engine RPM | 7000 RPM | 6100 RPM |
Torque | 410 Nm | 439 Nm |
Torque RPM | 3500 RPM | 3600 RPM |
Engine Bore Size | 84.6 mm | 92 mm |
Engine Stroke Size | 92.7 mm | 83 mm |
Engine Compression Ratio | 11.0:1 | 10.5:1 |
Fuel Type | Gasoline | Gasoline - Premium |
Top Speed | 249 km/hour | 250 km/hour |
Transmission Type | Manual | Manual |
Number of Seats | 5 seats | 4 seats |
Number of Doors | 4 doors | 2 doors |
Vehicle Length | 4590 mm | 4830 mm |
Vehicle Width | 1730 mm | 1860 mm |
Vehicle Height | 1430 mm | 1380 mm |
Wheelbase Size | 2650 mm | 2790 mm |
Fuel Tank Capacity | 63 L | 70 L |