Why Caterpillar Owns Perkins: The 1998 Deal Behind Half the Diesel Engines You've Never Heard Of

Ask most contractors what Caterpillar makes and you'll get one answer: excavators, dozers, loaders, yellow iron. Ask what Perkins makes and most people won't know the name at all, even though there's a real chance a Perkins engine is running somewhere on their site right now, in a generator, a compressor, a piece of agricultural equipment, or a backhoe loader built by a company that isn't Caterpillar at all. That's because Perkins is one of the world's largest independent diesel engine manufacturers, and it's been a wholly owned Caterpillar subsidiary since 1998, quietly operating in the background of an industry most contractors assume is split cleanly along brand lines.

Understanding why CAT bought an engine company that sells to its own competitors says something real about how Caterpillar thinks about its business, and it's a more interesting story than the average corporate acquisition.

Frank Perkins and the Diesel Engine Business That Started in Peterborough

Perkins Engines traces back to 1932, when Frank Perkins founded the company in Peterborough, England, with a focus that was genuinely unusual for the era: building smaller, lighter, high-speed diesel engines at a time when diesel power meant large, slow industrial units. That bet on compact diesel technology turned out to be exactly right as trucks, tractors, and construction equipment moved away from gasoline engines through the mid-20th century, and it's a big part of why Perkins became one of the dominant independent diesel engine suppliers in the world over the following decades, selling engines to equipment manufacturers who needed diesel power but didn't want to build their own engine division from scratch.

Perkins' early reputation was built partly outside the construction world entirely. The company is widely credited with helping popularize diesel power in passenger cars and taxis in Britain during the 1950s and 1960s, at a time when diesel in a car was still a novelty rather than an everyday option. That willingness to push diesel technology into markets nobody else had tried it in is part of the same engineering culture that eventually made Perkins attractive to a company like Caterpillar decades later.

That business model, independent engine supplier to other equipment brands, is still Perkins' core identity today, even under Caterpillar ownership. Perkins doesn't exist to only power Caterpillar machines. It exists to sell engines to the broader world of equipment builders who need reliable diesel power without the enormous cost of developing it in-house, which by the time of the Caterpillar acquisition included everything from small agricultural tractors to industrial generator sets to construction equipment built by brands with no direct relationship to Caterpillar at all.

Why Caterpillar Wanted an Engine Supplier to Its Own Competitors

In 1998, Caterpillar acquired Perkins from the British industrial group LucasVarity. On the surface, it's an odd move: Perkins' customer list includes plenty of companies that compete with Caterpillar in construction, agriculture, and power generation equipment, and Caterpillar now owned the company supplying some of those competitors' engines. But that's precisely the point. Engine manufacturing at scale is a different business than building excavators, with its own enormous research and development costs, emissions-compliance engineering, and manufacturing specialization. Caterpillar got access to a broader base of volume, R&D spread, and manufacturing scale by keeping Perkins' existing OEM customer base intact rather than walling the technology off exclusively for CAT-branded machines.

It's a strategy that shows up elsewhere in heavy industry: a parent company lets an acquired brand keep selling to the open market because the volume from outside customers helps fund the research and tooling that benefits everyone the engine technology eventually reaches, including the parent's own equipment lines. It's the same logic that lets a large dealer network, or a large parts distribution operation, serve more customers than its own brand alone would ever generate, and it tends to make the acquired business stronger rather than diluted.

Two Brands, One Owner: How Perkins and Cat Engines Coexist

More than 25 years after the acquisition, Perkins still operates as its own brand, with its own dealer and distribution network, selling engines under the Perkins name to agricultural equipment makers, generator set builders, industrial equipment manufacturers, and construction OEMs around the world who aren't Caterpillar. Caterpillar's own construction equipment, meanwhile, overwhelmingly runs on Cat-branded engines developed and built through Caterpillar's own engine division, which is a separate operation from Perkins inside the same parent company.

That distinction matters if you're trying to understand what you're actually buying. A new CAT excavator or dozer isn't running a Perkins-badged engine, it's running a Cat engine built by Caterpillar's own powertrain division. The Perkins relationship is really about what it tells you regarding Caterpillar as a company: this is a business with deep enough engineering resources to own and run two separate diesel engine operations at once, each serving a different part of the market, rather than a company that depends entirely on outside suppliers for the single most important component in anything it sells.

Perkins today sits inside Caterpillar's broader Energy and Transportation business, still headquartered in Peterborough where Frank Perkins started the company nearly a century ago, and still selling engines into dozens of countries around the world. It's effectively run as its own global business with its own factories, dealer network, and engineering teams, which is exactly why it's been able to keep its outside OEM customers through a corporate ownership change that could easily have spooked them into switching suppliers.

That structure is worth remembering the next time a competing equipment brand's sales rep tells you their machine's engine comes from "the same company that makes CAT engines." Depending on which engine they mean, that might be technically true. It still runs through an entirely separate engineering and support organization than the one standing behind a CAT-branded machine itself, with its own warranty, parts, and service relationships rather than Caterpillar's own dealer network.

What Caterpillar's Engine Depth Means for Contractors Financing Equipment

None of this changes a purchase decision directly, but it's worth knowing as context the next time someone tells you CAT's parts and engine support is more reliable than a smaller equipment brand's. A company that owns two separate global diesel engine operations, one serving its own equipment lines and one serving outside manufacturers, has engineering depth and a parts supply chain that a lot of smaller equipment makers simply don't have access to on their own. That's part of why CAT engines and parts tend to be available even on older machines, and why engine rebuilds and major repairs on CAT equipment are rarely a dead end the way they can be with a brand that's dependent on a single outside engine supplier.

For general contractors, excavation subcontractors, and demolition crews running CAT excavators, dozers, and wheel loaders on tight project timelines, that depth of engineering and parts support is part of the real cost-of-ownership calculation, even if it never shows up as a line item on an invoice. A machine that's easier to keep running is a machine that's actually earning its keep on your jobs instead of sitting in the yard waiting on a part.

It also matters at resale. A used CAT machine with a well-documented engine service history, backed by a dealer network that has ready access to factory parts rather than scrambling to source components from a smaller supplier, tends to hold its value better over a longer ownership window. That's a real factor if you're planning to trade a machine in or sell it privately in three, five, or ten years rather than running it into the ground.

The Takeaway for Contractors

Whether the depth of a manufacturer's engineering and parts network factors into your next purchase or not, the financing decision underneath it stays the same: does it make more sense to tie up cash buying a machine outright, keep paying recurring rental costs for equipment you use regularly, or finance it against the revenue it generates on your jobs. BFC provides construction equipment financing nationwide for CAT excavators, dozers, and wheel loaders, whether you're buying from a dealer like H.O. Penn in New York and Connecticut or any other authorized CAT dealer in the country, new or well-documented used.

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