Cummins launched its newest engine at the Work Truck Show Wednesday in Indianapolis, debuting the new B7.2 diesel engine for medium-duty applications.
The newest member of the company's legendary B-Series engine platform, the B7.2 diesel is the next engine in the B series HELM platform, following the B6.7 Octane engine. Cummins says the new engine will be available in 2027 and support a variety of medium-duty and vocational applications, including bus, pickup and delivery, utility trucks, refuse, towing and more.
“Our B engine is a legend known around the world. We are proud to unveil the newest version, the B7.2 diesel engine, right here in our backyard,” says Brett Merritt, vice president and president – Engine Business. “The B7.2 brings the latest technology and advancements to one of our most proven platforms. Combined with the rest of our medium-duty lineup, our customers will have the right engine choices to fit their business needs, with the power and dependability they have come to expect from Cummins.”
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Arguably the most important feature of the new engine is its slightly higher displacement, which allows for a wider range of torque offerings, creating flexibility for different applications and duty cycles. The engine features 240 to 340 hp and 650 to 1,000 lb.-ft of torque, and offers a compression release engine brake and extended oil drain interval pan option. It also is automatic engine shutdown and stop-start capable for improved greenhouse gas emissions, the company says.
“Our customers have used the B-Series engine for more than 40 years and rely on it every day to meet their needs,” says Jose Samperio, vice president North America On-Highway. “It was important that we offer the reliability and performance that they have come to expect, while also creating an engine that is built to last for the future.”
The B7.2 also comes equipped with a full suite of digital technologies, which Cummins says help enhance performance, maximize uptime and reduce total cost of ownership. With the B7.2, customers can use digital tools that enhance driver experience, including predictive capabilities (prognostics) and advanced over-the-air features. Finally, B7.2 is Cummins Maintenance Monitor capable, reducing shop visits and minimizing cost of operation.
The B7.2 engine will be manufactured at Cummins’ Rocky Mount Engine Plant in North Carolina and will go into full production in North America starting in 2027.
Cummins also used the Work Truck Show stage to tease its full lineup of medium-duty combustion engines, showcasing its 6.7L Turbo Diesel, its B6.7L Octane and its X10 heavy-duty, mid-bore engine.
The new 2025 6.7L Turbo Diesel was unveiled in January and delivers an impressive list of drivability, towing and serviceability improvements. The 6.7L Turbo Diesel is powering all of Ram Truck’s Heavy-Duty diesel lineup, and was on display at the Ram booth during the show.
The B6.7 Octane is the company's first advancement into the gasoline market, a "diesel engine that runs on gasoline," Samperio says, with power, durability and diesel-like performance and the simplicity of gasoline.
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Cummins says the engine offers up to 300 horsepower and 660 lb.-ft., of torque, providing customers with dependable power and up to 10% better fuel economy over other gasoline-powered engines. The B6.7 Octane uses standard 87 octane gasoline and requires less maintenance with a simple, passive three-way catalyst and no need for DEF (diesel exhaust fluid).
The X10 also earned the spotlight on Wednesday. Delivering up to 450 horsepower and 1,650 lb.-ft., of torque, the X10 is built for versatility. Built off the company's proven L9 and X12 platforms, the X10 brings efficiency, dependability and innovation to the next level. Whether for vocational, regional-haul, transit bus or other demanding applications, Cummins says the X10 will be ready for the job.
