2007 Audi A4 vs. 2009 Mercedes-Benz B
To start off, 2009 Mercedes-Benz B is newer by 2 year(s). Which means there will be less support and parts availability for 2007 Audi A4. In addition, the cost of maintenance, including insurance, on 2007 Audi A4 would be higher. At 1,989 cc (4 cylinders), 2009 Mercedes-Benz B is equipped with a bigger engine. In terms of performance, 2007 Audi A4 (161 HP @ 5700 RPM) has 23 more horse power than 2009 Mercedes-Benz B. (138 HP @ 4200 RPM). In normal driving conditions, 2007 Audi A4 should accelerate faster than 2009 Mercedes-Benz B. With that said, vehicle weight also plays an important factor in acceleration. 2009 Mercedes-Benz B weights approximately 1 kg more than 2007 Audi A4.
Both vehicles are front wheel drive (FWD). Which offers better traction when its slippery than 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, 2009 Mercedes-Benz B (300 Nm @ 1600 RPM) has 75 more torque (in Nm) than 2007 Audi A4. (225 Nm @ 1750 RPM). This means 2009 Mercedes-Benz B will have an easier job in driving up hills or pulling heavy equipment than 2007 Audi A4. 2007 Audi A4 has automatic transmission and 2009 Mercedes-Benz B has manual transmission. 2009 Mercedes-Benz B will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2007 Audi A4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2007 Audi A4 | 2009 Mercedes-Benz B | |
| Make | Audi | Mercedes-Benz |
| Model | A4 | B |
| Year Released | 2007 | 2009 |
| Body Type | Sedan | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1781 cc | 1989 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Valves per Cylinder | 5 valves | 4 valves |
| Horse Power | 161 HP | 138 HP |
| Engine RPM | 5700 RPM | 4200 RPM |
| Torque | 225 Nm | 300 Nm |
| Torque RPM | 1750 RPM | 1600 RPM |
| Engine Bore Size | 81 mm | 83 mm |
| Engine Stroke Size | 86.4 mm | 92 mm |
| Engine Compression Ratio | 9.3:1 | 18.0:1 |
| Fuel Type | Gasoline | Diesel |
| Top Speed | 223 km/hour | 200 km/hour |
| Acceleration 0-100mph | 8.6 seconds | 9.7 seconds |
| Drive Type | Front | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1434 kg | 1435 kg |
| Vehicle Length | 4590 mm | 4280 mm |
| Vehicle Width | 1780 mm | 1610 mm |
| Vehicle Height | 1430 mm | 1780 mm |
| Wheelbase Size | 2650 mm | 2780 mm |
| Fuel Consumption Overall | 8.2 L/100km | 5.6 L/100km |
| Fuel Tank Capacity | 70 L | 54 L |
