FIVE REASONS WHY THE PSI 8.8L IS THE BEST IN ITS CLASS

Purpose-built for the school bus industry, PSI's medium-duty 8.8L naturally aspired engine is available with a gasoline or propane power unit developed from the block up to be reliable and durable.

1. HEAVY-DUTY DESIGN

  • Forged, induction-hardened crankshaft
  • Forged rods and pistons
  • Oil bath lubrication provides piston cooling
  • Low engine-speed design produces less noise, heat and wear than competitor gasoline and propane engines


2. SERVICEABLE

  • Both the engine compartment and engine provide best-in-class accessibility for easy maintenance
  • Includes the industry’s only one-stop warranty for gasoline and propane vehicles
  • Allison Transmission 7-year / Unlimited mileage warranty Industry's broadest, most capable parts distribution and dealer network


3. ALLISON TRANSMISSIONS

  • Shorter, sturdier shaft has increased durability vs. Ford
  • Over 44% more clutch material vs. Ford so it holds gear and lasts longer in the toughest operation
  • Heavy-duty park pawl better secures vehicle


4. POWER OF CHOICE

  • Gasoline and Propane versions use same engine block providing an easy solution for mechanics and drivers of mixed fleets
  • Gasoline and Propane make cold weather startup easy
  • Upfront cost is lower for gasoline compared to diesel


5. REAL-WORLD PERFORMANCE

  • Low engine speed design drives like a diesel, with no compromise on engine power and reliability
  • More low-rpm horsepower is available versus Ford
  • Higher torque rating at all rpms

SPEC COMPARISON

How does the PSI 8.8L compare to the Ford 6.8L V-10 on paper? Download the full comparison to find out.

Other articles you might like

X

Use of Cookies and Privacy Notice Update

Cookies are used on this site to assist in continually improving the user experience and all the interaction data we store of our visitors is anonymous.

Learn more about your rights on our Privacy Notice page.

Confirm