2005 Audi S8 vs. 2004 BMW Z4
To start off, 2005 Audi S8 is newer by 1 year(s). Which means there will be less support and parts availability for 2004 BMW Z4. In addition, the cost of maintenance, including insurance, on 2004 BMW Z4 would be higher. At 4,172 cc (8 cylinders), 2005 Audi S8 is equipped with a bigger engine. In terms of performance, 2005 Audi S8 (247 HP @ 4000 RPM) has 22 more horse power than 2004 BMW Z4. (225 HP @ 5900 RPM). In normal driving conditions, 2005 Audi S8 should accelerate faster than 2004 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S8 weights approximately 375 kg more than 2004 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2005 Audi S8 is all wheel drive (AWD), it will have significant more traction and grip than 2004 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2005 Audi S8 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, 2005 Audi S8 (450 Nm @ 3400 RPM) has 150 more torque (in Nm) than 2004 BMW Z4. (300 Nm @ 3500 RPM). This means 2005 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2004 BMW Z4.
Compare all specifications:
| 2005 Audi S8 | 2004 BMW Z4 | |
| Make | Audi | BMW |
| Model | S8 | Z4 |
| Year Released | 2005 | 2004 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 4172 cc | 2983 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 247 HP | 225 HP |
| Engine RPM | 4000 RPM | 5900 RPM |
| Torque | 450 Nm | 300 Nm |
| Torque RPM | 3400 RPM | 3500 RPM |
| Drive Type | AWD | Rear |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1770 kg | 1395 kg |
| Wheelbase Size | 2290 mm | 2500 mm |
| Fuel Tank Capacity | 90 L | 55 L |
