2009 Audi A4 vs. 2007 Audi A8
To start off, 2009 Audi A4 is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Audi A8. In addition, the cost of maintenance, including insurance, on 2007 Audi A8 would be higher. At 5,998 cc (12 cylinders), 2007 Audi A8 is equipped with a bigger engine. In terms of performance, 2007 Audi A8 (450 HP @ 6200 RPM) has 322 more horse power than 2009 Audi A4. (128 HP @ 5700 RPM) In normal driving conditions, 2007 Audi A8 should accelerate faster than 2009 Audi A4. With that said, vehicle weight also plays an important factor in acceleration. 2007 Audi A8 weights approximately 518 kg more than 2009 Audi A4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2007 Audi A8 is four wheel drive (4WD), it will have significant more traction and grip than 2009 Audi A4. In wet, icy, snow, or gravel driving conditions, 2007 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, 2007 Audi A8 (580 Nm @ 4000 RPM) has 385 more torque (in Nm) than 2009 Audi A4. (195 Nm @ 3500 RPM). This means 2007 Audi A8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi A4. 2007 Audi A8 has automatic transmission and 2009 Audi A4 has manual transmission. 2009 Audi A4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Audi A8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A4 | 2007 Audi A8 | |
| Make | Audi | Audi |
| Model | A4 | A8 |
| Year Released | 2009 | 2007 |
| Body Type | Convertible | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1984 cc | 5998 cc |
| Engine Cylinders | 4 cylinders | 12 cylinders |
| Engine Type | in-line | W |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 128 HP | 450 HP |
| Engine RPM | 5700 RPM | 6200 RPM |
| Torque | 195 Nm | 580 Nm |
| Torque RPM | 3500 RPM | 4000 RPM |
| Engine Bore Size | 82.6 mm | 84 mm |
| Engine Stroke Size | 92.8 mm | 90 mm |
| Fuel Type | Gasoline - Premium | Diesel |
| Drive Type | Front | 4WD |
| Transmission Type | Manual | Automatic |
| Number of Seats | 4 seats | 4 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1630 kg | 2148 kg |
| Vehicle Length | 4580 mm | 5200 mm |
| Vehicle Width | 1780 mm | 1900 mm |
| Vehicle Height | 1400 mm | 1460 mm |
| Wheelbase Size | 2660 mm | 3080 mm |
| Fuel Consumption Overall | 8.6 L/100km | 13.8 L/100km |
| Fuel Tank Capacity | 70 L | 90 L |
