A26 Engine

INTRODUCING THE INTERNATIONAL® A26
BIG BORE ENGINE.

BORN FROM A NEW WAY OF THINKING.
BUILT WITH UPTIME IN ITS DNA.


A26 Engine mobile image

It’s our steadfast commitment to leading the industry in uptime and a fresh way of looking at engine design. With a new team and fresh ideas we set out to deliver the ultimate 12.4-liter engine.

Engine efficiency specifications *600-700 lbs lighter than traditional 15L engines
Engine creation video See the making of an engine from the ground up.
Scroll down to see more
Team slide 1

A NEW ENGINE DEMANDED NEW THINKING.


We call it Project Alpha — a new approach to uptime. We pulled in our best powertrain engineers to build upon the most trusted and proven components. The result is the A26.

Engine creation video Go behind the scenes of Project Alpha.
Team slide 2

Darren Gosbee

VP, Powertrain Engineering


By launching Project Alpha, Darren Gosbee encouraged his team to utilize the latest thinking, processes, methodologies, and concepts to create an entirely new type of engine with the A26.

Team video See why Darren thinks the A26 is the next step forward.
Team slide 3

Jim Nachtman

Lead Design Engineer


In his quest to deliver the greatest uptime possible in an engine, Jim Nachtman and his team followed a simple philosophy – what’s the best it can be and how can we get there. By simplifying many of the systems that go into the A26, they were able to create the lightest engine in the marketplace.

Engine creation video See how Jim helped create a leader in the marketplace.

Millions of miles of testing. Zero left to chance.

Tested and validated to new industry standards.

DYNO


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Hundreds of thousands of dyno testing hours

ROAD


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Millions of real-world test miles

TEST UNITS


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Hundreds of engines tested

Engine performance video See how we put the all-new A26 to the test.

BUILT FROM THE BLOCK UP


Based on the MAN® D26 engine platform, then perfected for the North American market.

Build Your Truck Download Brochure
Engine overview image
Engine overview image Overview
Features a low friction coating for increased fuel economy and larger piston pin and connecting rod for optimal load distribution and durability.
Engine overview image Piston New Piston Assembly

Features a low friction coating for increased fuel economy and larger piston pin and connecting rod for optimal load distribution and durability.

Engine overview image
Higher strength and more fatigue resistant than traditional gray iron because of its thinner walls that reduce weight and maximize payload. Sculpted to dampen vibration for a quieter in-cab experience.
Engine crankcase image Crankcase COMPACTED GRAPHITE IRON (CGI) CRANKCASE

Higher strength and more fatigue resistant than traditional gray iron because of it’s thinner walls that reduce weight and maximize payload. Sculpted to dampen vibration for a quieter in-cab experience.

Engine crankcase image
Its new design achieves the perfect balance between weight, strength, cooling and breathing, leading to better uptime and fuel economy.
Engine cylinder head image CYLINDER HEAD CYLINDER HEAD

Its new design achieves the perfect balance between weight, strength, cooling and breathing, leading to better uptime and fuel economy.

Engine cylinder head image
Stainless steel, laser welded, single stage EGR cooler delivers proven durability and performance, in a compact, easy-to-service design.
Engine EGR image EGR COOLER EGR COOLER

Stainless steel, laser welded, single stage EGR cooler delivers proven durability and performance, in a compact, easy-to-service design.

Engine EGR image
Gear teeth are produced using a grinding process for smoother, harder gear surfaces that create less noise.
Engine gear train image GEAR TRAIN GEAR TRAIN

Gear teeth are produced using a grinding process for smoother, harder gear surfaces that create less noise.

Engine gears image

A New Engine Deserves A Best-In-Class Warranty.


We stand behind the A26 with a two-year unlimited hours or miles warranty that lets you take it as far as you want, for as many hours/miles as you want. Go ahead, go the extra mile.

Two Year Unlimited Miles Warranty

Industry-Leading Service Intervals

The A26's design allows for increased service intervals keeping you on the road longer.

Oil Change: Now up to 70,000 miles.*
*With oil sampling and International Truck approval.

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Diesel Particulate Filter Cleaning: Now up to 600,000 miles*
*With greater than 6.5 mpg

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BEST-IN-CLASS B10 LIFE

International B10 standards require 90% of all engines to endure 1.2 million miles before an engine rebuild is required.

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Specifications

The A26 is packed with efficient muscle and built to set a new standard in its class.

Horsepower Ratings
HP @ 1700 RPM Torque [ft*lb] @ RPM Governed speed [RPM] High idle speed [RPM]
370 1350 @ 1000 1800 2000
400 1550-1750 @ 975 1800 2000
410 1450 @ 1000 1800 2000
410 1450-1650 @ 1000 1800 2000
430 1550 @ 1000 1800 2000
450 1700 @ 1000 1800 2000
450 1550-1700 @ 1000 1800 2000
475 1700 @ 1000 1800 2000
Technical Specifications
Engine Type Diesel, 4-Cycle
Configuration Inline 6-Cylinder
Displacement 12.4 L (758 cu. in.)
Bore & Stroke 4.96 in. & 6.54 in. (126 mm & 166 mm)
Compression Ratio 18.5:1
Aspiration Variable Geometry Turbocharger with Charge Air Cooler
Combustion System 2500 bar High Pressure Common Rail
Engine Lubrication 42 Quarts (40 L)
Total Engine Weight 2,299 lbs. (1043 kg)
Valves 4 Valves Per Cylinder, Single Overhead Camshaft
B10 Design Style 1,200,000 mi (1,931,000)
Maintenance Intervals
Replace Engine Oil and Oil Filter Up to 70,000 miles with oil sampling and International Truck approval
Greater than 6.5 mpg: 50,000 miles (80,000 km)
5.5 to 6.5 mpg: 35,000 miles (56,000 km)
Less than 5.5 mpg: 20,000 miles (32,000 km), 400 hours, or 6 months
Replace Fuel Filter At every oil change or 1,300 hours
Diesel Particulate Filter Cleaning Greater than 6.5 mpg: 600,000 miles / 11,000 hours
5.5 to 6.5 mpg: 500,000 miles / 9,000 hours
Less than 5.5 mpg: 350,000 miles / 9,000 hours
Replace DEF Filter 300,000 miles (483,000 km)
Add Extended Life Coolant Extender 600,000 miles (966,000 kilometers)
Replace Coolant 1,200,000 miles (1,931,000 km) / 8 years / 15,000 hours
Adjust Valve Lash At 120,000 miles (193,000 km), at 300,000 miles (483,000 km), then every 300,000 miles (483,000 km)
At 1,700 hours, at 3,400 hours, then every 5,400 hours
ONE BEST-IN-CLASS ENGINE.
TWO WORLD RENOWNED TRUCKS.

This A26 engine represents the best of who we are and what our vision is. So it makes sense that we're putting it in the world's most driver-centric trucks that do the same - starting with the uncompromising International® LT, RH, HX and HV Series.
Best in Class - LT and RH

THE A26 IS GOING ON TOUR.