2007 Audi A8 vs. 2009 Audi A4
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 5,997 cc, 2007 Audi A8 is equipped with a bigger engine. In terms of performance, 2007 Audi A8 (444 HP @ 6200 RPM) has 283 more horse power than 2009 Audi A4. (161 HP @ 4000 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 275 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 230 more torque (in Nm) than 2009 Audi A4. (350 Nm @ 1500 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:
| 2007 Audi A8 | 2009 Audi A4 | |
| Make | Audi | Audi |
| Model | A8 | A4 |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | Convertible |
| Engine Position | Front | Front |
| Engine Size | 5997 cc | 2495 cc |
| Engine Type | W | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 444 HP | 161 HP |
| Engine RPM | 6200 RPM | 4000 RPM |
| Torque | 580 Nm | 350 Nm |
| Torque RPM | 4000 RPM | 1500 RPM |
| Engine Bore Size | 84 mm | 78.3 mm |
| Engine Stroke Size | 90.2 mm | 86.4 mm |
| Engine Compression Ratio | 11.0:1 | 18.0:1 |
| Fuel Type | Gasoline - Premium | Diesel |
| Top Speed | 250 km/hour | 225 km/hour |
| Acceleration 0-100mph | 5.2 seconds | 9.7 seconds |
| Drive Type | 4WD | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1995 kg | 1720 kg |
| Vehicle Length | 5070 mm | 4580 mm |
| Vehicle Width | 1900 mm | 1780 mm |
| Vehicle Height | 1460 mm | 1400 mm |
| Wheelbase Size | 3080 mm | 2660 mm |
| Fuel Consumption Overall | 13.8 L/100km | 7.3 L/100km |
| Fuel Tank Capacity | 90 L | 70 L |
