2005 Audi A6 vs. 1991 Ford Sierra
To start off, 2005 Audi A6 is newer by 14 year(s). Which means there will be less support and parts availability for 1991 Ford Sierra. In addition, the cost of maintenance, including insurance, on 1991 Ford Sierra would be higher. At 2,393 cc (6 cylinders), 2005 Audi A6 is equipped with a bigger engine. In terms of performance, 2005 Audi A6 (170 HP @ 4000 RPM) has 95 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM). In normal driving conditions, 2005 Audi A6 should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2005 Audi A6 weights approximately 470 kg more than 1991 Ford Sierra. So despite on having greater horse power, its additional weight may have an impact towards its acceleration in comparison.
Let's talk about torque, 2005 Audi A6 (371 Nm @ 1500 RPM) has 219 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 2005 Audi A6 will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 2005 Audi A6 | 1991 Ford Sierra | |
| Make | Audi | Ford |
| Model | A6 | Sierra |
| Year Released | 2005 | 1991 |
| Engine Position | Front | Front |
| Engine Size | 2393 cc | 1751 cc |
| Engine Cylinders | 6 cylinders | 4 cylinders |
| Engine Type | V | in-line |
| Horse Power | 170 HP | 75 HP |
| Engine RPM | 4000 RPM | 4500 RPM |
| Torque | 371 Nm | 152 Nm |
| Torque RPM | 1500 RPM | 2200 RPM |
| Engine Bore Size | 78.3 mm | 82.5 mm |
| Engine Stroke Size | 86.4 mm | 82 mm |
| Fuel Type | Diesel | Diesel |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 5 doors | 4 doors |
| Vehicle Weight | 1615 kg | 1145 kg |
| Vehicle Length | 4800 mm | 4430 mm |
| Vehicle Width | 1820 mm | 1700 mm |
| Vehicle Height | 1460 mm | 1370 mm |
| Wheelbase Size | 2760 mm | 2620 mm |
| Fuel Tank Capacity | 70 L | 60 L |
