It all starts with the right engine
Whether diesel, propane, gas or electric, long-range trips or short local drives, we have the power to meet your needs today and are pioneering the engines of tomorrow. With an attention to detail and focus on your fleet, we keep you on the road and moving forward.
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Fuel Options
Diesel
- Most commonly selected fuel choice
- Proven reputation for durability
- Improved mileage
- Cleaner formula than prior years
- Robust infrastructure already in place
- Technicians with deep knowledge readily available
- Strong residual value
Propane
- Available fuel subsidies
- More stable fuel pricing
- Cleaner burning than diesel
- Better startup and fewer complexities in cold weather
- Higher acquisition costs, often offset by subsidies or incentives
- Easier and less costly to maintain
- No idling restrictions
- Idling less detrimental to the vehicle
- Quieter engine
- No aftertreatment required
- 90% domestic fuel
Gasoline
- Technicians with deep knowledge, readily available
- Better startup and fewer complexities in cold weather
- Quieter engine
- Idling is less detrimental to the vehicle
- No aftertreatment required
- Lowest acquisition cost
- Most districts already running gasoline buses (Type A)
- Easier and less costly to maintain
Engine Options
No matter which engine you choose to suit your needs, rock-solid durability always comes standard.

Cummins B6.7 SPECIFICATIONS
Engine Type
Diesel, 4-Cycle
Configuration
Inline, 6-Cylinder
Displacement
409 cu. in. (6.7L)
Bore and Stroke
4.21 x 4.88 in
Aspiration
Variable Geometry Turbocharger
Combustion System
Direct Injection
Engine Lubrication
15L
Total Engine Weight (Dry)
1,150 lbs.
Horsepower
200-260 hp
Torque
520-660 lb.-ft.

PSI 8.8L Propane SPECIFICATIONS
Cylinders
V8
Induction System
Naturally Aspirated
Combustion System
Spark-ignited
Displacement
535 cid (8.767 L)
Compression Ratio
10.1:1
Emissions Certification
US EPA & CARB HD-SI
Engine Oil Capacity (with filter)
7.5 qts (7.10 L)
Fuel Type
Propane
Bore & Stroke
4.35 in x 4.50 in (110.5 mm x 114.3 mm)
Rated Power
270 hp (201 kw)
Rated Torque
565 lb.-ft. (766 nm)
Cooling System
Water-cooled
Engine Coolant Capacity
16 qts
Engine Oil Capacity
7.0 qts (6.62 L)
Direction of Rotation
Clockwise From Front
Dry Weight
748 lb. (339 kg)

PSI 8.8L Gasoline SPECIFICATIONS
Cylinders
V8
Induction System
Naturally Aspirated
Combustion System
Spark-ignited
Displacement
535 cid (8.767 L)
Compression Ratio
9.1:1
Engine Oil Capacity
7.0 qts (6.62 L)
Direction of Rotation
Clockwise From Front
Dry Weight
748 lb. (339 kg)
Bore & Stroke
4.35 in x 4.50 in (110.5 mm x 114.3 mm)
Rated Power
265 hp (197.6 kw)
Rated Torque
548 lb.-ft. (743 nm)
Cooling System
Water-cooled
Engine Coolant Capacity
16 qts
Engine Oil Capacity (with filter)
7.5 qts (7.10 L)
Fuel Type
Gasoline

Cummins L9 SPECIFICATIONS
Cylinders
Inline 6
Fuel Type
Diesel
Combustion System
Direct Injection
Horsepower
300 (max)
Torque
860 lb-ft. (max)
Bore & Stroke
4.49" 5.69"
Engine Lubrication
15L
Rated Power
270 hp (201 kw)
Dry Weight
1,695 lbs.
Displacement
5.43 cu. in. (8.9L)
Aspiration
Variable Geometry Turbocharger