2005 Audi S4 vs. 2003 BMW 645
To start off, 2005 Audi S4 is newer by 2 year(s). Which means there will be less support and parts availability for 2003 BMW 645. In addition, the cost of maintenance, including insurance, on 2003 BMW 645 would be higher. At 4,398 cc (8 cylinders), 2003 BMW 645 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (339 HP @ 7000 RPM) has 29 more horse power than 2003 BMW 645. (310 HP @ 6000 RPM). In normal driving conditions, 2005 Audi S4 should accelerate faster than 2003 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2003 BMW 645 weights approximately 23 kg more than 2005 Audi S4.
Because 2005 Audi S4 is four wheel drive (4WD), it will have significant more traction and grip than 2003 BMW 645. In wet, icy, snow, or gravel driving conditions, 2005 Audi S4 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, 2003 BMW 645 (450 Nm @ 3600 RPM) has 20 more torque (in Nm) than 2005 Audi S4. (430 Nm @ 3500 RPM). This means 2003 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2005 Audi S4. 2003 BMW 645 has automatic transmission and 2005 Audi S4 has manual transmission. 2005 Audi S4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2003 BMW 645 will be easier to drive especially in heavy traffic.
Compare all specifications:
2005 Audi S4 | 2003 BMW 645 | |
Make | Audi | BMW |
Model | S4 | 645 |
Year Released | 2005 | 2003 |
Body Type | Sedan | Coupe |
Engine Position | Front | Front |
Engine Size | 4163 cc | 4398 cc |
Engine Cylinders | 8 cylinders | 8 cylinders |
Engine Type | V | V |
Valves per Cylinder | 5 valves | 4 valves |
Horse Power | 339 HP | 310 HP |
Engine RPM | 7000 RPM | 6000 RPM |
Torque | 430 Nm | 450 Nm |
Torque RPM | 3500 RPM | 3600 RPM |
Engine Bore Size | 84.5 mm | 92 mm |
Engine Stroke Size | 92.8 mm | 82.7 mm |
Engine Compression Ratio | 11.0:1 | 10.5:1 |
Top Speed | 250 km/hour | 250 km/hour |
Acceleration 0-100mph | 5.9 seconds | 5.9 seconds |
Drive Type | 4WD | Rear |
Transmission Type | Manual | Automatic |
Number of Seats | 5 seats | 4 seats |
Number of Doors | 4 doors | 2 doors |
Vehicle Weight | 1675 kg | 1698 kg |
Vehicle Length | 4580 mm | 4830 mm |
Vehicle Width | 1790 mm | 1860 mm |
Vehicle Height | 1420 mm | 1380 mm |
Wheelbase Size | 2580 mm | 2790 mm |
Fuel Consumption Overall | 13.4 L/100km | 10.9 L/100km |
Fuel Tank Capacity | 66 L | 70 L |