The Detroit DD8 is a 7.7-liter, 6-cylinder diesel engine built for medium-duty Freightliner trucks, including the M2 106, 108SD, and 114SD. Designed for maximum efficiency, performance, and uptime, the DD8 provides the dependable power and intelligent technology today’s operators rely on.

Detroit DD8 Power and Performance

The Detroit DD8 engine delivers horsepower ratings from 260 to 375 HP and torque between 660 and 1,050 lb-ft, offering the strength and responsiveness needed for a variety of regional and vocational applications. Engines rated between 260–300 HP feature a single-stage turbocharger for smooth, efficient performance. Models rated 330 HP and above use a fixed-geometry dual-stage turbocharger to provide extra power and rapid throttle response. Optional front and rear engine PTOs (power take-offs) are available to drive auxiliary equipment and support demanding jobs.

Advanced Detroit DD8 Technology

The Detroit DD8 is engineered with Variable Cam Phasing (VCP), a smart system that manages exhaust temperatures to optimize DPF (Diesel Particulate Filter) regeneration. This allows the DD8 to regenerate efficiently while driving, reducing the need for parked regens and helping your truck stay productive. Fuel efficiency is another built-in advantage. The DD8’s design ensures that less fuel consumed means less exhaust produced, creating a cleaner and more efficient operation with reduced downtime.

Uptime and Maintenance Benefits

The Detroit DD8 engine is built for longevity and minimal service interruptions. Its extended maintenance intervals help lower your total cost of ownership:

• 55,000-mile short-haul engine oil and filter change
• 55,000-mile short-haul fuel filter change

The DD8 shares many components with the Detroit DD5, improving parts availability and service efficiency across your fleet. This commonality simplifies maintenance, saves time, and keeps your trucks working instead of waiting.

Why Choose the Detroit DD8?

Whether your operation involves construction, utility, pickup and delivery, or municipal work, the Detroit DD8 delivers the reliability, fuel economy, and low-maintenance design you need to stay efficient. With the Detroit DD8 under the hood, you get the performance, technology, and uptime that define the Detroit name.