If you own a classic Ford Bronco or are considering restoring one, understanding which engine your vehicle came with from the factory is essential. Whether you're hunting for parts, planning a rebuild, or just diving into your Bronco’s history, identifying the original engine can save you time, money, and confusion.

From the rugged inline-6s of the early years to the powerful V8s of the full-size models, Ford offered a variety of engines across the Bronco’s first three decades. With engine swaps being common in the enthusiast community, having a clear reference of what was stock for each model year is a valuable starting point.

Why Engine Identification Matters

Knowing your Bronco’s original engine helps you:

• Order the correct replacement parts – From gaskets to ignition components, compatibility matters.

• Avoid mismatches – Many components are engine-specific and may not work with swapped or non-original configurations.

• Preserve value – Restoring a Bronco to its factory specifications can increase its collector value.

• Speed up repairs – When troubleshooting, it's easier to pinpoint issues when you know what you're working with.

Factory Engine Options by Year

The table below shows which engine models were available directly from Ford for each Bronco model year from 1966 to 1996. This includes the early compact Broncos (1966–1977) and the full-size versions (1978–1996). An "X" marks engine options available for that year, while a "-" indicates it was not offered.

1966–77 Ford Bronco Engine Options

The 1966–77 Ford Bronco came with a small but reliable selection of factory engines. Early models featured the 170 cubic inch inline-6, later upgraded to a 200 I6. In 1967 and 1968, the 289 V8 was available before being replaced by the more powerful and widely used 302 V8 starting in 1969. These engines defined the Bronco’s early reputation for durability and off-road capability.

Shop 1966-77 Ford Bronco Engine Parts

1978–79 Ford Bronco Engine Options

The 1978–79 Ford Bronco marked the transition to a full-size SUV, bringing larger engine options to match. During these two years, buyers could choose between the 351M V8 and the more powerful 400 V8. Both engines delivered the torque and performance needed for towing, off-roading, and the increased size of the second-generation Bronco.

Shop 1978-79 Ford Bronco Engine Parts

1980–86 Ford Bronco Engine Options

From 1980 to 1986, the Ford Bronco offered a balanced mix of power and efficiency with three engine options: the dependable 300 cubic inch inline-6, the popular 302 V8, and the high-performance 351W V8. This generation focused on improved drivability and emissions compliance while still delivering the rugged capability Bronco owners expected. Note that 1980-81 Bronco had a 351M engine option. This engine could also be found on some early 1982 Ford Broncos due to leftover inventory.

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1987–91 Ford Bronco Engine Options

The 1987–91 Ford Bronco continued with the proven engine lineup of the 300 I6, 302 V8, and 351W V8. These years brought updates in fuel injection and electronics, improving reliability and performance. Whether you needed torque for towing or smooth highway driving, these engine options offered solid versatility for both work and recreation.

Shop 1987-91 Ford Bronco Engine Parts

1992–96 Ford Bronco Engine Options

The 1992–96 Ford Bronco carried forward the trusted 300 I6, 302 V8, and 351W V8 engines, now with refined fuel injection and updated emissions systems. These final years of the full-size Bronco delivered improved drivability, reliability, and performance—making them popular among enthusiasts for both restoration and everyday use.

Shop 1992-96 Ford Bronco Engine Parts

Decoding the Engine Names

• I6 = Inline 6-cylinder

• V8 = V8-cylinder engine

• Examples:

  • 170 I6: A simple and durable engine found in early Broncos.

  • 302 V8: One of the most popular and widely supported V8s.

  • 351W V8: A Windsor-series V8 with strong performance and aftermarket support.

  • 400 V8: A large-displacement engine typically found in late '70s full-size Broncos.

Tips for Identifying Your Engine

1. Check the VIN – Many VINs include engine codes.

2. Look for casting numbers – Stamped on the engine block, these can reveal model and production date.

3. Consult factory manuals – OEM documents often list engine configurations by year and trim.

4. Ask a specialist – If you're not sure, take a few photos and ask your local engine shop.

Need Help Finding Parts?

At WILD HORSES 4x4, we specialize in OEM and high-quality aftermarket parts for classic Ford Broncos. Whether you’re running a 170 I6 or a beefy 351 Windsor, we’ve got the components to keep your Bronco running strong.

Still unsure what engine parts you need? Contact our team and we’ll help you identify it—no guesswork required!