1991 Ford Sierra vs. 2003 Lexus IS
To start off, 2003 Lexus IS 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 1,988 cc (6 cylinders), 2003 Lexus IS is equipped with a bigger engine. In terms of performance, 2003 Lexus IS (153 HP @ 6200 RPM) has 78 more horse power than 1991 Ford Sierra. (75 HP @ 4500 RPM) In normal driving conditions, 2003 Lexus IS should accelerate faster than 1991 Ford Sierra. With that said, vehicle weight also plays an important factor in acceleration. 2003 Lexus IS weights approximately 255 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 Lexus IS (196 Nm @ 4600 RPM) has 44 more torque (in Nm) than 1991 Ford Sierra. (152 Nm @ 2200 RPM). This means 2003 Lexus IS will have an easier job in driving up hills or pulling heavy equipment than 1991 Ford Sierra.
Compare all specifications:
| 1991 Ford Sierra | 2003 Lexus IS | |
| Make | Ford | Lexus |
| Model | Sierra | IS |
| Year Released | 1991 | 2003 |
| Engine Position | Front | Front |
| Engine Size | 1751 cc | 1988 cc |
| Engine Cylinders | 4 cylinders | 6 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 75 HP | 153 HP |
| Engine RPM | 4500 RPM | 6200 RPM |
| Torque | 152 Nm | 196 Nm |
| Torque RPM | 2200 RPM | 4600 RPM |
| Engine Bore Size | 82.5 mm | 75 mm |
| Engine Stroke Size | 82 mm | 75 mm |
| Fuel Type | Diesel | Gasoline |
| Number of Seats | 5 seats | 5 seats |
| Number of Doors | 4 doors | 4 doors |
| Vehicle Weight | 1145 kg | 1400 kg |
| Vehicle Length | 4430 mm | 4410 mm |
| Vehicle Width | 1700 mm | 1730 mm |
| Vehicle Height | 1370 mm | 1430 mm |
| Wheelbase Size | 2620 mm | 2680 mm |
| Fuel Tank Capacity | 60 L | 70 L |
