2009 Audi A4 vs. 1991 Opel Astra
To start off, 2009 Audi A4 is newer by 18 year(s). Which means there will be less support and parts availability for 1991 Opel Astra. In addition, the cost of maintenance, including insurance, on 1991 Opel Astra would be higher. At 1,798 cc (4 cylinders), 2009 Audi A4 is equipped with a bigger engine. In terms of performance, 2009 Audi A4 (158 HP @ 4500 RPM) has 102 more horse power than 1991 Opel Astra. (56 HP @ 4600 RPM). In normal driving conditions, 2009 Audi A4 should accelerate faster than 1991 Opel Astra. With that said, vehicle weight also plays an important factor in acceleration. 1991 Opel Astra weights approximately 120 kg more than 2009 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 Audi A4 (250 Nm @ 1500 RPM) has 145 more torque (in Nm) than 1991 Opel Astra. (105 Nm @ 2400 RPM). This means 2009 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Opel Astra. 2009 Audi A4 has automatic transmission and 1991 Opel Astra has manual transmission. 1991 Opel Astra will offer better control over acceleration and deceleration in addition to better fuel efficiency overall. 2009 Audi A4 will be easier to drive especially in heavy traffic.
Compare all specifications:
| 2009 Audi A4 | 1991 Opel Astra | |
| Make | Audi | Opel |
| Model | A4 | Astra |
| Year Released | 2009 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 1798 cc | 1700 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 158 HP | 56 HP |
| Engine RPM | 4500 RPM | 4600 RPM |
| Torque | 250 Nm | 105 Nm |
| Torque RPM | 1500 RPM | 2400 RPM |
| Engine Bore Size | 82.5 mm | 82.5 mm |
| Engine Stroke Size | 84.1 mm | 79.5 mm |
| Engine Compression Ratio | 9.6:1 | 23.0:1 |
| Top Speed | 218 km/hour | 150 km/hour |
| Acceleration 0-100mph | 8.9 seconds | 18.8 seconds |
| Drive Type | Front | Front |
| Transmission Type | Automatic | Manual |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 3 doors |
| Vehicle Weight | 930 kg | 1050 kg |
| Vehicle Length | 4710 mm | 4060 mm |
| Vehicle Width | 2010 mm | 1670 mm |
| Vehicle Height | 1430 mm | 1430 mm |
| Wheelbase Size | 2810 mm | 2530 mm |
| Fuel Tank Capacity | 65 L | 40 L |
