1991 Ford Sierra vs. 2003 Mazda 6
To start off, 2003 Mazda 6 is newer by 12 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 1,837 cc (4 cylinders), 2003 Mazda 6 is equipped with a bigger engine. In terms of performance, 2003 Mazda 6 (118 HP @ 5500 RPM) has 43 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 2003 Mazda 6 should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Mazda 6 weights approximately 265 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, 2003 Mazda 6 (244 Nm @ 4500 RPM) has 92 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 2003 Mazda 6 will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 2003 Mazda 6 | |
| Make | Ford | Mazda |
| Model | Sierra | 6 |
| Year Released | 1991 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 1751 cc | 1837 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 118 HP |
| Engine RPM | 4500 RPM | 5500 RPM |
| Torque | 152 Nm | 244 Nm |
| Torque RPM | 2200 RPM | 4500 RPM |
| Engine Bore Size | 82.5 mm | 83 mm |
| Engine Stroke Size | 82 mm | 83.1 mm |
| Engine Compression Ratio | 21.5:1 | 11.0:1 |
| Fuel Type | Diesel | Gasoline - Premium |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 5 doors |
| Vehicle Weight | 1145 kg | 1410 kg |
| Vehicle Length | 4430 mm | 4710 mm |
| Vehicle Width | 1700 mm | 1790 mm |
| Vehicle Height | 1370 mm | 1490 mm |
| Wheelbase Size | 2620 mm | 2270 mm |
| Fuel Tank Capacity | 60 L | 64 L |
