Mack vs. International Dump Trucks: Drivetrain and Durability Compared

Drivetrain and durability are where dump truck brand loyalty gets decided — ask any fleet manager who's run both Mack and International and they'll usually have a strong opinion on the engine, not just the badge. Here's a focused look at how the two brands' vocational drivetrains actually compare.

Mack's In-House Engine Philosophy

Mack builds its own engines — the MP8, rated up to roughly 505 horsepower and 1,860 lb-ft of torque in its top configurations, powers the flagship Granite, while the lighter Cummins ISL9 (345 hp, 1,150 lb-ft) powers the Granite MHD configuration for lighter local routes. Because Mack designs and builds the MP8 in-house alongside its chassis and (on many spec's) its own mDRIVE transmission, the whole drivetrain is engineered as one integrated system rather than assembled from third-party components — Mack's argument, and one borne out by decades of severe-duty vocational reputation, is that this integration pays off in durability under the kind of abuse a dump truck takes on a construction or quarry site day after day.

International's A26 and the Class Transition

International's heavier vocational trucks, including the severe-duty HX Series, are built around the International A26 engine, rated up to roughly 500 horsepower with torque in the 1,700-1,850 lb-ft range depending on configuration — a proprietary powertrain International developed to compete directly with Mack's and other OEMs' in-house engines rather than relying purely on Cummins. On the medium-duty side, International is also mid-transition: the CV Series is ending production in 2026, with the MV Series stepping up to Class 6-7 and offering Cummins B6.7 and L9 options for contractors who don't need the full A26-powered HX platform.

Durability: Two Different Bets

Mack's bet is full vertical integration — one company engineering the engine, transmission, and often the rear axle to work as a single system, which tends to simplify warranty claims and service diagnostics because there's one manufacturer accountable for the whole drivetrain's interaction. International's bet with the A26 is a proprietary engine that still leans on Cummins power for its medium-duty MV Series, giving contractors a mix of in-house heavy-duty engineering on the HX side and widely-serviced Cummins power on the MV side — a genuine advantage if your shop or the dealers in your region are more comfortable with Cummins parts and diagnostics than with a fully proprietary powertrain.

Which Fits Your Fleet

If you run heavy, punishing duty cycles — quarry work, demolition debris hauling, or long days on rough site roads — Mack's fully integrated MP8 drivetrain has the vocational reputation to back up the investment. If your fleet spans both heavy HX-class work and lighter MV-class routes and you want more common ground on parts and service across that range, International's mix of A26 and Cummins power gives you that flexibility. Either way, put your actual duty cycle and your shop's parts familiarity ahead of brand loyalty when you spec the next truck.

Financing Your Next Truck or Machine Through BFC

Both Mack and International build genuinely durable vocational drivetrains — the right one for your fleet comes down to your duty cycle and financing it instead of renting keeps the payoff in your business. Renting builds nothing — the equipment goes back at the end of the job and every dollar spent is gone for good. Financing turns that same spend into equity in a machine or truck you actually own, one you can keep working, resell, or borrow against. And BFC won't make you wait years until one unit is paid off before helping fund the next — our job is helping your business grow.

Apply for financing today, browse BFC's own equipment inventory to buy now, or list your used equipment for sale for free through that same equipment-for-sale page. Visit our home page to see everything BFC finances.