Mitsubishi Debonair engines
Mitsubishi Debonair is a Japanese luxury car in the body of a 4-door sedan from Mitsubishi Motors. Produced from 1964 to 1998. Translated, the name of the car means “polite / courteous.” Initially, the model was made only for the needs of the domestic market, for employees and staff of the company. The car was produced in three generations. In the 2nd and 3rd generations, the model was also released for the Asian market under the name Hyundai Grandeur.
The Mitsubishi Debonair was offered with 5 engines between 1970 and 1999 (5 petrol). Displacement ranges from 2.0 to 3.5 liters, power output from 103 to 280 hp. 1 use a timing chain and 3 a timing belt. 1 is turbocharged. The longest rated lifespan belongs to the Mitsubishi 4G54 (about 450,000 km).
Mitsubishi Debonair engines by generation
| Engine | Years | Volume | Power | Fuel | Timing | Oil | Lifespan |
|---|---|---|---|---|---|---|---|
| Mitsubishi Debonair 1 (A30) 1970–1986 | |||||||
| Mitsubishi 6G34 | 1970–1976 | 2.0 L R6 | petrol | ||||
| Mitsubishi 4G54 | 1978–1986 | 2.6 L R4 | 103–175 hp | petrol, NA / turbo | chain | 4.9 L | ~450,000 km |
| Mitsubishi Debonair 2 (S1) 1986–1992 | |||||||
| Mitsubishi 6G71 | 1986–1992 | 2.0 L V6 | 105–150 hp | petrol | belt | 4.3 L | ~300,000 km |
| Mitsubishi Debonair 3 (S2) 1992–1999 | |||||||
| Mitsubishi 6G74 | 1992–1999 | 3.5 L V6 | 180–280 hp | petrol | belt | 5.7 L | ~400,000 km |
| Other Mitsubishi Debonair engines generation not specified | |||||||
| Mitsubishi 6G72 | 1986–2008 | 3.0 L V6 | 140–240 hp | petrol | belt | 5.5 L | ~400,000 km |
Mitsubishi Debonair engine FAQ
What engines were used in the Mitsubishi Debonair?
Mitsubishi Debonair 1 (A30) (1970–1986): Mitsubishi 6G34 and Mitsubishi 4G54; Mitsubishi Debonair 2 (S1) (1986–1992): Mitsubishi 6G71; Mitsubishi Debonair 3 (S2) (1992–1999): Mitsubishi 6G74.
Which Mitsubishi Debonair engine is the most durable?
By rated service life the most durable Mitsubishi Debonair engines are: Mitsubishi 4G54 — about 450,000 km; Mitsubishi 6G72 — about 400,000 km; Mitsubishi 6G74 — about 400,000 km. Actual lifespan depends heavily on maintenance and oil change intervals.
How much oil does the Mitsubishi Debonair engine take?
Engine oil capacity with filter: Mitsubishi 4G54 — 4.9 L (5W-40); Mitsubishi 6G71 — 4.3 L (5W-40); Mitsubishi 6G72 — 5.5 L (5W-30, 5W-40); Mitsubishi 6G74 — 5.7 L (5W-30, 5W-40).
Does the Mitsubishi Debonair have a timing belt or chain?
Timing chain: Mitsubishi 4G54; timing belt: Mitsubishi 6G71, Mitsubishi 6G72 and Mitsubishi 6G74. Belts must be replaced on schedule: on many engines a broken belt bends the valves.
Was the Mitsubishi Debonair available with a diesel engine?
No, all Mitsubishi Debonair engines in our database run on petrol.
Engine details
Mitsubishi 4G54
This engine is very reliable and has an impressive resource.
Mitsubishi 6G71
The motors of the first years of production were damp and caused a lot of problems.
Mitsubishi 6G72
Apart from the engines of the first years of production, this is a very reliable engine with a huge resource. Most of…
Mitsubishi 6G74
Modifications of the engine with distributed injection are undemanding to the quality of fuel, which cannot be said about the common versions…
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