1999 Audi TT vs. 1991 BMW 518
To start off, 1999 Audi TT is newer by 8 year(s). Which means there will be less support and parts availability for 1991 BMW 518. In addition, the cost of maintenance, including insurance, on 1991 BMW 518 would be higher. At 1,781 cc (4 cylinders), 1999 Audi TT is equipped with a bigger engine. In terms of performance, 1999 Audi TT (178 HP @ 5900 RPM) has 64 more horse power than 1991 BMW 518. (114 HP @ 5500 RPM). In normal driving conditions, 1999 Audi TT should accelerate faster than 1991 BMW 518. With that said, vehicle weight also plays an important factor in acceleration. 1999 Audi TT weights approximately 305 kg more than 1991 BMW 518. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Because 1999 Audi TT is four wheel drive (4WD), it will have significant more traction and grip than 1991 BMW 518. In wet, icy, snow, or gravel driving conditions, 1999 Audi TT will offer significantly more control. 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, 1999 Audi TT (235 Nm @ 2200 RPM) has 70 more torque (in Nm) than 1991 BMW 518. (165 Nm @ 4250 RPM). This means 1999 Audi TT will have an easier job in driving up hills or pulling heavy equipment than 1991 BMW 518.
Compare all specifications:
| 1999 Audi TT | 1991 BMW 518 | |
| Make | Audi | BMW |
| Model | TT | 518 |
| Year Released | 1999 | 1991 |
| Body Type | Coupe | Sedan |
| Engine Position | Front | Front |
| Engine Size | 1781 cc | 1766 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 178 HP | 114 HP |
| Engine RPM | 5900 RPM | 5500 RPM |
| Torque | 235 Nm | 165 Nm |
| Torque RPM | 2200 RPM | 4250 RPM |
| Engine Bore Size | 81 mm | 84 mm |
| Engine Stroke Size | 86.4 mm | 81 mm |
| Engine Compression Ratio | 9.0:1 | 8.8:1 |
| Drive Type | 4WD | Rear |
| Transmission Type | Manual | Manual |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 2 doors | 4 doors |
| Vehicle Weight | 1465 kg | 1160 kg |
| Vehicle Length | 4050 mm | 4730 mm |
| Vehicle Width | 1770 mm | 1760 mm |
| Vehicle Height | 1350 mm | 1420 mm |
| Wheelbase Size | 2440 mm | 2770 mm |
