2004 Audi S4 vs. 2006 BMW 645

To start off, 2006 BMW 645 is newer by 2 year(s). Which means there will be less support and parts availability for 2004 Audi S4. In addition, the cost of maintenance, including insurance, on 2004 Audi S4 would be higher. At 4,398 cc (8 cylinders), 2006 BMW 645 is equipped with a bigger engine. In terms of performance, 2004 Audi S4 (340 HP @ 6200 RPM) has 12 more horse power than 2006 BMW 645. (328 HP @ 6100 RPM). In normal driving conditions, 2004 Audi S4 should accelerate faster than 2006 BMW 645. With that said, vehicle weight also plays an important factor in acceleration. 2004 Audi S4 weights approximately 59 kg more than 2006 BMW 645. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.

Let's talk about torque, 2006 BMW 645 (450 Nm) has 39 more torque (in Nm) than 2004 Audi S4. (411 Nm). This means 2006 BMW 645 will have an easier job in driving up hills or pulling heavy equipment than 2004 Audi S4.

Compare all specifications:

2004 Audi S4 2006 BMW 645
Make Audi BMW
Model S4 645
Year Released 2004 2006
Body Type Convertible Convertible
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 2 valves
Horse Power 340 HP 328 HP
Engine RPM 6200 RPM 6100 RPM
Torque 411 Nm 450 Nm
Engine Bore Size 85 mm 92 mm
Engine Stroke Size 93 mm 83 mm
Number of Seats 4 seats 4 seats
Number of Doors 2 doors 2 doors
Vehicle Weight 1895 kg 1836 kg
Vehicle Length 4580 mm 4830 mm
Vehicle Width 1780 mm 1860 mm
Vehicle Height 1400 mm 1380 mm
Wheelbase Size 2770 mm 2790 mm
Fuel Consumption Overall 11.8 L/100km 12.8 L/100km
Fuel Tank Capacity 63 L 70 L