2008 Audi A8 vs. 2006 GMC Sierra
To start off, 2008 Audi A8 is newer by 2 year(s). Which means there will be less support and parts availability for 2006 GMC Sierra. In addition, the cost of maintenance, including insurance, on 2006 GMC Sierra would be higher. At 5,998 cc, 2008 Audi A8 is equipped with a bigger engine. In terms of performance, 2008 Audi A8 (445 HP @ 6200 RPM) has 150 more horse power than 2006 GMC Sierra. (295 HP @ 5200 RPM). In normal driving conditions, 2008 Audi A8 should accelerate faster than 2006 GMC Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2006 GMC Sierra weights approximately 664 kg more than 2008 Audi A8.
Both vehicles are four wheel drive (4WD) - it offers better handling, traction, and control in all driving conditions compared with front wheel drive or rear wheel drive vehicles. 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, 2008 Audi A8 (580 Nm @ 4000 RPM) has 126 more torque (in Nm) than 2006 GMC Sierra. (454 Nm @ 4000 RPM). This means 2008 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2006 GMC Sierra.
Compare all specifications:
| 2008 Audi A8 | 2006 GMC Sierra | |
| Make | Audi | GMC |
| Model | A8 | Sierra |
| Year Released | 2008 | 2006 |
| Body Type | Sedan | Pickup |
| Engine Position | Front | Front |
| Engine Size | 5998 cc | 5326 cc |
| Engine Type | W | V |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 445 HP | 295 HP |
| Engine RPM | 6200 RPM | 5200 RPM |
| Torque | 580 Nm | 454 Nm |
| Torque RPM | 4000 RPM | 4000 RPM |
| Engine Bore Size | 84 mm | 96 mm |
| Engine Stroke Size | 90.2 mm | 92 mm |
| Engine Compression Ratio | 11.0:1 | 9.4:1 |
| Fuel Type | Gasoline - Premium | Gasoline |
| Drive Type | 4WD | 4WD |
| Number of Seats | 5 seats | 6 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1995 kg | 2659 kg |
| Vehicle Length | 5190 mm | 6330 mm |
| Vehicle Width | 1900 mm | 2000 mm |
| Vehicle Height | 1460 mm | 1880 mm |
| Wheelbase Size | 3080 mm | 4010 mm |
| Fuel Consumption Overall | 13.8 L/100km | 14.7 L/100km |
| Fuel Tank Capacity | 90 L | 129 L |
