2009 Audi A4 vs. 1991 BMW Z1
To start off, 2009 Audi A4 is newer by 18 year(s). Which means there will be less support and parts availability for 1991 BMW Z1. In addition, the cost of maintenance, including insurance, on 1991 BMW Z1 would be higher. At 2,698 cc (6 cylinders), 2009 Audi A4 is equipped with a bigger engine. In terms of performance, 2009 Audi A4 (187 HP @ 3500 RPM) has 12 more horse power than 1991 BMW Z1. (175 HP @ 5800 RPM). In normal driving conditions, 2009 Audi A4 should accelerate faster than 1991 BMW Z1. With that said, vehicle weight also plays an important factor in acceleration. 2009 Audi A4 weights approximately 420 kg more than 1991 BMW Z1. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1991 BMW Z1 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 1991 BMW Z1. However, in wet, icy, snow, or gravel driving conditions, 2009 Audi A4, 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, 2009 Audi A4 (400 Nm @ 1400 RPM) has 170 more torque (in Nm) than 1991 BMW Z1. (230 Nm @ 4000 RPM). This means 2009 Audi A4 will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW Z1.
Compare all specifications:
| 2009 Audi A4 | 1991 BMW Z1 | |
| Make | Audi | BMW |
| Model | A4 | Z1 |
| Year Released | 2009 | 1991 |
| Body Type | Sedan | Roadster |
| Engine Position | Front | Front |
| Engine Size | 2698 cc | 2497 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | V | in-line |
| Valves per Cylinder | 4 valves | 2 valves |
| Horse Power | 187 HP | 175 HP |
| Engine RPM | 3500 RPM | 5800 RPM |
| Torque | 400 Nm | 230 Nm |
| Torque RPM | 1400 RPM | 4000 RPM |
| Engine Bore Size | 83.1 mm | 82 mm |
| Engine Stroke Size | 83.1 mm | 78.8 mm |
| Engine Compression Ratio | 16.8:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline |
| Drive Type | Front | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Weight | 1670 kg | 1250 kg |
| Vehicle Length | 4710 mm | 3960 mm |
| Vehicle Width | 1830 mm | 1810 mm |
| Vehicle Height | 1430 mm | 1280 mm |
| Wheelbase Size | 2810 mm | 2450 mm |
