2009 Acura RDX vs. 2005 Audi S4
To start off, 2009 Acura RDX is newer by 4 year(s). Which means there will be less support and parts availability for 2005 Audi S4. In addition, the cost of maintenance, including insurance, on 2005 Audi S4 would be higher. At 4,163 cc (8 cylinders), 2005 Audi S4 is equipped with a bigger engine. In terms of performance, 2005 Audi S4 (340 HP @ 7000 RPM) has 100 more horse power than 2009 Acura RDX. (240 HP @ 6000 RPM) In normal driving conditions, 2005 Audi S4 should accelerate faster than 2009 Acura RDX. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi S4 weights approximately 405 kg more than 2009 Acura RDX. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
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, 2005 Audi S4 (410 Nm @ 3500 RPM) has 57 more torque (in Nm) than 2009 Acura RDX. (353 Nm @ 4500 RPM). This means 2005 Audi S4 will have an easier job in driving up hills or pulling heavy equipment than 2009 Acura RDX. 2009 Acura RDX has automatic transmission and 2005 Audi S4 has manual transmission. 2005 Audi S4 will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Acura RDX will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Acura RDX | 2005 Audi S4 | |
| Make | Acura | Audi |
| Model | RDX | S4 |
| Year Released | 2009 | 2005 |
| Body Type | SUV | Convertible |
| Engine Position | Front | Front |
| Engine Size | 2300 cc | 4163 cc |
| Engine Cylinders | 4 cylinders | 8 cylinders |
| Engine Type | in-line | V |
| Valves per Cylinder | 4 valves | 5 valves |
| Horse Power | 240 HP | 340 HP |
| Engine RPM | 6000 RPM | 7000 RPM |
| Torque | 353 Nm | 410 Nm |
| Torque RPM | 4500 RPM | 3500 RPM |
| Engine Compression Ratio | 11.0:1 | 11.0:1 |
| Fuel Type | Gasoline | Gasoline - Premium |
| Drive Type | 4WD | 4WD |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 4 seats |
| Number of Doors | 5 doors | 2 doors |
| Vehicle Weight | 1450 kg | 1855 kg |
| Vehicle Length | 4600 mm | 4580 mm |
| Vehicle Width | 1880 mm | 1790 mm |
| Vehicle Height | 1660 mm | 1450 mm |
| Wheelbase Size | 2660 mm | 2660 mm |
| Fuel Consumption | 10.7 L/100km | 11.4 L/100km |
| Fuel Consumption City | 13.8 L/100km | 15.8 L/100km |
| Fuel Consumption Overall | 12.4 L/100km | 14 L/100km |
| Fuel Tank Capacity | 68 L | 63 L |
