1991 Audi 100 vs. 2006 BMW Z4
To start off, 2006 BMW Z4 is newer by 15 year(s). Which means there will be less support and parts availability for 1991 Audi 100. In addition, the cost of maintenance, including insurance, on 1991 Audi 100 would be higher. At 2,979 cc (6 cylinders), 2006 BMW Z4 is equipped with a bigger engine. In terms of performance, 2006 BMW Z4 (228 HP @ 5900 RPM) has 56 more horse power than 1991 Audi 100. (172 HP @ 5500 RPM) In normal driving conditions, 2006 BMW Z4 should accelerate faster than 1991 Audi 100. With that said, vehicle weight also plays an important factor in acceleration. 1991 Audi 100 weights approximately 141 kg more than 2006 BMW Z4.
Let's talk about torque, 2006 BMW Z4 (301 Nm @ 3500 RPM) has 51 more torque (in Nm) than 1991 Audi 100. (250 Nm @ 3000 RPM). This means 2006 BMW Z4 will have an easier job in driving up hills or pulling heavy equipment than 1991 Audi 100.
Compare all specifications:
| 1991 Audi 100 | 2006 BMW Z4 | |
| Make | Audi | BMW |
| Model | 100 | Z4 |
| Year Released | 1991 | 2006 |
| Engine Position | Front | Front |
| Engine Size | 2771 cc | 2979 cc |
| Engine Cylinders | 6 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 172 HP | 228 HP |
| Engine RPM | 5500 RPM | 5900 RPM |
| Torque | 250 Nm | 301 Nm |
| Torque RPM | 3000 RPM | 3500 RPM |
| Engine Bore Size | 82.5 mm | 84 mm |
| Engine Stroke Size | 86.4 mm | 89.6 mm |
| Fuel Type | Gasoline | Gasoline - Premium |
| Number of Seats | 5 seats | 2 seats |
| Vehicle Weight | 1506 kg | 1365 kg |
| Vehicle Length | 4800 mm | 4100 mm |
| Vehicle Width | 1780 mm | 1790 mm |
| Vehicle Height | 1450 mm | 1310 mm |
