1984 Isuzu Piazza vs. 2004 Opel Signum
To start off, 2004 Opel Signum is newer by 20 year(s). Which means there will be less support and parts availability for 1984 Isuzu Piazza. In addition, the cost of maintenance, including insurance, on 1984 Isuzu Piazza would be higher. At 1,993 cc (4 cylinders), 1984 Isuzu Piazza is equipped with a bigger engine. In terms of performance, 1984 Isuzu Piazza (148 HP @ 5400 RPM) has 23 more horse power than 2004 Opel Signum. (125 HP @ 5600 RPM). In normal driving conditions, 1984 Isuzu Piazza should accelerate faster than 2004 Opel Signum. With that said, vehicle weight also plays an important factor in acceleration. 2004 Opel Signum weights approximately 100 kg more than 1984 Isuzu Piazza.
Let's talk about torque, 1984 Isuzu Piazza (226 Nm @ 3000 RPM) has 56 more torque (in Nm) than 2004 Opel Signum. (170 Nm @ 3800 RPM). This means 1984 Isuzu Piazza will have an easier job in driving up hills or pulling heavy equipment than 2004 Opel Signum.
Compare all specifications:
| 1984 Isuzu Piazza | 2004 Opel Signum | |
| Make | Isuzu | Opel |
| Model | Piazza | Signum |
| Year Released | 1984 | 2004 |
| Body Type | Hatchback | Hatchback |
| Engine Position | Front | Front |
| Engine Size | 1993 cc | 1796 cc |
| Engine Cylinders | 4 cylinders | 4 cylinders |
| Engine Type | in-line | in-line |
| Horse Power | 148 HP | 125 HP |
| Engine RPM | 5400 RPM | 5600 RPM |
| Torque | 226 Nm | 170 Nm |
| Torque RPM | 3000 RPM | 3800 RPM |
| Engine Bore Size | 88 mm | 80.5 mm |
| Engine Stroke Size | 82 mm | 88.2 mm |
| Engine Compression Ratio | 7.9:1 | 10.5:1 |
| Fuel Type | Gasoline | Gasoline |
| Number of Seats | 4 seats | 5 seats |
| Number of Doors | 3 doors | 5 doors |
| Vehicle Weight | 1280 kg | 1380 kg |
| Vehicle Length | 4290 mm | 4640 mm |
| Vehicle Width | 1610 mm | 1800 mm |
| Vehicle Height | 1330 mm | 1470 mm |
| Wheelbase Size | 2510 mm | 2700 mm |
