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

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PSI 8.8L V8 Gasoline

Based on feedback from our customers, we set out to develop a gasoline powered, commercial-grade V8 engine purpose-built for school buses that features similar power and performance to diesel. This means immediate acceleration from a complete stop and greater hill climbing capability. In other words: a no-compromise solution for school districts everywhere.

 

PSI 8.8L V8 Propane

SPI's high-performance V8 can handle the rigors of on-road duty delivering a clean-technology solution without sacrificing power or performance. Superior engine performance is driven by an ECU that integrates and coordinates all critical functions including governor, variable ignition timing, air/fuel ratio, knock suppression and engine protection.