Renault Df264

To understand the DF264’s value, we must place it in its historical context. In 1999, the competitors were:

Verdict: The DF264 is not the best engine of the era, but it is the cheapest to keep on the road if you are a DIY mechanic.

For the enthusiast, the DF264 responds well to mild tuning. Because the bottom end (crank and rods) is over-engineered from its MIDR roots, modest power increases are safe. renault df264

Note: Tuning will almost certainly fail emissions tests and shorten the life of the VP44 pump.

The DF264 wasn't designed to win drag races; it was designed to never stop running. Produced primarily throughout the 1960s and early 1970s, this engine represents the golden era of Renault’s industrial diesel division. To understand the DF264’s value, we must place

This is a naturally aspirated, in-line, water-cooled four-cylinder. But don’t let the simple specs fool you. The "264" in its name refers to the displacement per cylinder, giving the engine a total cubic capacity of roughly 3.2 liters.

| Parameter | Detail | |-----------|--------| | Engine code | DF264 | | Family | Renault F814 (Midr) | | Configuration | Inline 6-cylinder | | Displacement | 6,208 cc (6.2 L) | | Bore x stroke | 97 mm x 140 mm | | Fuel type | Diesel | | Aspiration | Naturally aspirated (no turbo) | | Fuel system | Indirect injection (Ricardo pre-combustion chamber design) | | Injection pump | Rotary or in-line Bosch / Lucas CAV depending on market | | Compression ratio | Approximately 21:1 | | Max power | 95–105 hp (70–77 kW) @ 3,200–3,400 rpm | | Max torque | 220–235 N·m (162–173 lb·ft) @ 2,000 rpm | | Cooling | Water-cooled with belt-driven fan | | Valvetrain | Overhead valve (OHV), 2 valves per cylinder | | Engine weight | ~350 kg (dry) | | Emission standard | Euro 0 / Euro 1 (depending on year) | Verdict: The DF264 is not the best engine

Under extreme heat conditions—often caused by a failed fan clutch or blocked intercooler—the cylinder head can develop micro-cracks between the valve seats. This leads to coolant loss and white smoke.

Killing the DF264 was not a decision based purely on engineering. It was a perfect storm of corporate politics, market shifts, and a single fatal coincidence.

| Engine | Displacement | Power | Torque | Configuration | Notes | |--------|-------------|-------|--------|---------------|-------| | Renault DF264 | 6.2L | 95 hp | 230 Nm | I6 NA diesel | Simple, durable, understressed. | | Perkins 4.236 | 3.9L | 80 hp | 260 Nm | I4 NA diesel | Smaller, lighter, more common in UK. | | Mercedes OM352 | 5.7L | 120 hp | 360 Nm | I6 NA diesel | More powerful but heavier. | | Ford Dorset 2.5L | 2.5L | 70 hp | 150 Nm | I4 NA diesel | Used in smaller vans (less torque). |

The DF264 occupied a "medium-duty" niche – larger than a 4-cylinder van engine but smaller and less powerful than 7–8L truck diesels.