2006 Audi S4 vs. 2009 BMW Z4
To start off, 2009 BMW Z4 is newer by 3 year(s). Which means there will be less support and parts availability for 2006 Audi S4. In addition, the cost of maintenance, including insurance, on 2006 Audi S4 would be higher. At 4,163 cc (8 cylinders), 2006 Audi S4 is equipped with a bigger engine. In terms of performance, 2006 Audi S4 (340 HP @ 7000 RPM) has 79 more horse power than 2009 BMW Z4. (261 HP @ 6600 RPM). In normal driving conditions, 2006 Audi S4 should accelerate faster than 2009 BMW Z4. With that said, vehicle weight also plays an important factor in acceleration. 2006 Audi S4 weights approximately 135 kg more than 2009 BMW Z4. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 2009 BMW Z4 is rear wheel drive (RWD), it offers better handling in dry conditions; in addition, if you are looking to drift, it will be much easier to do with 2009 BMW Z4. However, in wet, icy, snow, or gravel driving conditions, 2006 Audi S4, being front wheel drive (FWD), will offer much better control with better grip. 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, 2006 Audi S4 (410 Nm @ 3500 RPM) has 95 more torque (in Nm) than 2009 BMW Z4. (315 Nm @ 2750 RPM). This means 2006 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2009 BMW Z4. 2009 BMW Z4 has automatic transmission and 2006 Audi S4 has manual transmission. 2006 Audi S4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 BMW Z4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2006 Audi S4 | 2009 BMW Z4 | |
| Make | Audi | BMW |
| Model | S4 | Z4 |
| Year Released | 2006 | 2009 |
| Body Type | Sedan | Coupe |
| Engine Position | Front | Front |
| Engine Size | 4163 cc | 2996 cc |
| Engine Cylinders | 8 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 340 HP | 261 HP |
| Engine RPM | 7000 RPM | 6600 RPM |
| Torque | 410 Nm | 315 Nm |
| Torque RPM | 3500 RPM | 2750 RPM |
| Engine Bore Size | 84.6 mm | 85.1 mm |
| Engine Stroke Size | 93 mm | 88 mm |
| Engine Compression Ratio | 11.0:1 | 10.7:1 |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Automatic |
| Number of Seats | 5 seats | 2 seats |
| Number of Doors | 4 doors | 2 doors |
| Vehicle Weight | 1530 kg | 1395 kg |
| Vehicle Length | 4590 mm | 4100 mm |
| Vehicle Width | 1790 mm | 1790 mm |
| Vehicle Height | 1420 mm | 1270 mm |
| Wheelbase Size | 2660 mm | 2500 mm |
| Fuel Consumption Overall | 13.8 L/100km | 8.9 L/100km |
| Fuel Tank Capacity | 63 L | 55 L |
