From 1991 until 2004, the company produced the 3.2-liter Isuzu 6VD1 V6 gasoline engine, which was fitted to both the company’s SUVs and those made by other manufacturers. The engine came in two versions: DOHC, which produced 195–205 horsepower, and SOHC, which produced 175–190 horsepower..

Engines of the V-series: 6VD1, 6VE1.
Specifications
| Production years | 1991-2004 |
| Displacement, cc | 3165 |
| Fuel system | injector |
| Power output, hp | 175 – 190 (6VD1 SOHC) 195 – 205 (6VD1-W DOHC) |
| Torque output, Nm | 260 – 265 (6VD1 SOHC) 265 – 290 (6VD1-W DOHC) |
| Cylinder block | aluminum V6 |
| Block head | aluminum 12v (6VD1 SOHC) aluminum 24v (6VD1-W DOHC) |
| Cylinder bore, mm | 93.4 |
| Piston stroke, mm | 77 |
| Compression ratio | 9.3 – 9.8 (6VD1 SOHC) 9.4 – 9.8 (6VD1-W DOHC) |
| Features | SOHC (6VD1 SOHC) DOHC (6VD1-W DOHC) |
| Hydraulic lifters | yes (6VD1 SOHC) yes/no (6VD1-W DOHC) |
| Timing drive | belt |
| Phase regulator | no |
| Turbocharging | no |
| Recommended engine oil | 5W-30 |
| Engine oil capacity, liter | 5.2 (6VD1 SOHC) 5.4 (6VD1-W DOHC) |
| Fuel type | petrol |
| Euro standards | EURO 2 (6VD1 SOHC) EURO 2/3 (6VD1-W DOHC) |
| Fuel consumption, L/100 km (for Isuzu Trooper 1997) — city — highway — combined |
19.6 11.2 14.8 |
| Engine lifespan, km | ~350 000 |
| Weight, kg | 184 |
The engine was installed on:
- Isuzu Trooper 2 (UB2) in 1991 – 2002;
- Isuzu VehiCROSS 1 (UG) in 1997 – 1999;
- Isuzu Wizard 1 (UC) in 1993 – 1998; Wizard 2 (UE) in 1998 – 2004;
- Opel Frontera B (U99) in 1998 – 2004;
- Opel Monterey A (M92) in 1992 – 1998;
- Honda Passport 1 (C58) in 1993 – 1997; Passport 2 (YF7) in 1997 – 2002;
- Acura SLX in 1996 – 1998.
Disadvantages of the Isuzu 6VD1 engine
Although this powertrain is highly dependable, it is notorious for using a lot of fuel.
Additionally, you should be aware that no service station will be able to fix this rare motor.
The oil burner is the main source of complaints from SUV owners with these engines.
The failure of hydraulic lifters or fuel injectors comes in second.
A belt needs to be replaced once every 100,000 kilometers, and timing rocker axles every 300,000 kilometers.
