2008 Audi S8 vs. 2009 Audi S5
To start off, 2009 Audi S5 is newer by 1 year(s). Which means there will be less support and parts availability for 2008 Audi S8. In addition, the cost of maintenance, including insurance, on 2008 Audi S8 would be higher. At 5,199 cc (10 cylinders), 2008 Audi S8 is equipped with a bigger engine. In terms of performance, 2008 Audi S8 (450 HP @ 7000 RPM) has 96 more horse power than 2009 Audi S5. (354 HP @ 6800 RPM). In normal driving conditions, 2008 Audi S8 should accelerate faster than 2009 Audi S5.
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 S8 (540 Nm @ 3500 RPM) has 99 more torque (in Nm) than 2009 Audi S5. (441 Nm @ 3500 RPM). This means 2008 Audi S8 will have an easier job in driving up hills or pulling heavy equipment than 2009 Audi S5. 2008 Audi S8 has automatic transmission and 2009 Audi S5 has manual transmission. 2009 Audi S5 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2008 Audi S8 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2008 Audi S8 | 2009 Audi S5 | |
| Make | Audi | Audi |
| Model | S8 | S5 |
| Year Released | 2008 | 2009 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 5199 cc | 4163 cc |
| Engine Cylinders | 10 cylinders | 8 cylinders |
| Engine Type | V | V |
| Valves per Cylinder | 4 valves | 4 valves |
| Horse Power | 450 HP | 354 HP |
| Engine RPM | 7000 RPM | 6800 RPM |
| Torque | 540 Nm | 441 Nm |
| Torque RPM | 3500 RPM | 3500 RPM |
| Drive Type | AWD | 4WD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 2 doors |
