2009 Audi A8 vs. 2008 BMW Z4
To start off, 2009 Audi A8 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 BMW Z4. In addition, the cost of maintenance, including insurance, on 2008 BMW Z4 would be higher. At 3,936 cc (8 cylinders), 2009 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 BMW Z4 (328 HP @ 7900 RPM) has 56 more horse power than 2009 Audi A8. (272 HP @ 3750 RPM) In normal driving conditions, 2008 BMW Z4 should accelerate faster than 2009 Audi A8. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A8 weights approximately 630 kg more than 2008 BMW Z4.
Because 2009 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2008 BMW Z4. In wet, icy, snow, or gravel driving conditions, 2009 Audi A8 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, 2009 Audi A8 (650 Nm @ 1800 RPM) has 335 more torque (in Nm) than 2008 BMW Z4. (315 Nm @ 2750 RPM). This means 2009 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2008 BMW Z4.
Compare all specifications:
| 2009 Audi A8 | 2008 BMW Z4 | |
| Make | Audi | BMW |
| Model | A8 | Z4 |
| Year Released | 2009 | 2008 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 3936 cc | 2996 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 272 HP | 328 HP |
| Engine RPM | 3750 RPM | 7900 RPM |
| Torque | 650 Nm | 315 Nm |
| Torque RPM | 1800 RPM | 2750 RPM |
| Fuel Type | Diesel | Gasoline |
| Top Speed | 250 km/hour | 239 km/hour |
| Acceleration 0-100mph | 6.8 seconds | 6.2 seconds |
| Drive Type | 4WD | Rear |
| Transmission Type | Automatic | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1940 kg | 1310 kg |
| Vehicle Length | 5190 mm | 4100 mm |
| Vehicle Width | 1900 mm | 1790 mm |
| Vehicle Height | 1460 mm | 1310 mm |
| Wheelbase Size | 3080 mm | 2500 mm |
| Fuel Consumption Overall | 9.6 L/100km | 9.5 L/100km |
| Fuel Tank Capacity | 90 L | 55 L |
