Blue Bird Commercial Vehicles: RX2, CX2, and FX2 Compared

Blue Bird builds three commercial bus platforms, and while they share the same body construction philosophy, they differ in ways that directly affect which one you should buy. Engine layout, fuel options, passenger capacity, and wheelbase range all vary between the RX2, CX2, and FX2. This comparison lays out the specifications side by side so fleet buyers can make an informed decision.

Ross Bus is the authorized Blue Bird dealer for Louisiana, and we sell and service all three platforms from our Alexandria headquarters. If you are looking for a commercial bus for sale, this comparison will help you narrow down which platform fits your operation before you make a fleet bus purchase. The details below come straight from Blue Bird specification sheets and our own experience maintaining these buses in the field.

Blue Bird RX2: Rear-Engine Durability

The RX2 is a rear-engine commercial bus designed for high-mileage transit operations. Its engine placement behind the rear axle improves ride quality for passengers and reduces cabin noise, which matters on long routes or frequent-stop service.

Passenger capacity: Up to 48 passengers

GVWR: Up to 36,200 lbs

Fuel options: Diesel (Cummins B6.7 200-300 hp, Cummins ISL8.9 260-300 hp) and CNG (Cummins ISL-G 250-280 hp)

Transmission: Allison 2500, B300, B300R, B400, or 3000, all 5 or 6 speed automatic

Fuel tank: Standard 60-gallon, optional 100-gallon

Wheelbase options: 189, 217, 245, 259, and 273 inches

Width: 96 inches exterior, 90 3/4 inches interior

Height: 121 to 128 inches overall, 77 inches interior

The RX2 is the right choice for operators who need proven Cummins diesel durability and the ride quality of a rear-engine layout. The CNG option makes it attractive for fleets with emissions requirements. The 100-gallon fuel tank option gives it extended range for long-haul shuttle routes.

Blue Bird CX2: the Flexible Platform

The CX2 is the most versatile commercial vehicle in the Blue Bird lineup. It is the only model that offers three fuel types: diesel, propane, and gasoline. That flexibility makes it the go-to choice for fleets that want to match fuel infrastructure to operating costs.

Passenger capacity: Up to 48 passengers

GVWR: Up to 33,000 lbs

Fuel options:

• Diesel: Cummins B6.7 200-260 hp or Cummins V5.0 220 hp, Allison 2500 or 3000 automatic, or Eaton Procision 7 speed automatic

• Propane: Ford 6.8L with ROUSH CleanTech system, 320 hp, Ford 6R140 6 speed automatic. Standard 67-gallon tank, optional 93-gallon

• Gasoline: Ford 6.8L V10, 320 hp, Ford 6R140 6 speed automatic. Standard 60-gallon tank, optional 100-gallon

Wheelbase options: 169, 189, 217, 238, 252, 273, and 280 inches (seven options, the widest range in the lineup)

Width: 96 inches exterior, 90 3/4 inches interior

Height: 121 to 128 inches overall, 77 inches interior

The CX2 propane model is worth special attention. Blue Bird has produced over 10,000 propane buses with more than 57 million miles driven. Propane can save an estimated $5,000 to $6,000 per bus annually compared to diesel, with stable fuel pricing around $1.60 per gallon. The CX2 is available in all wheelbases from 169 to 280 inches, with tank sizes from 50 to 100 gallons depending on wheelbase.

The seven wheelbase options mean the CX2 can be configured for everything from a short shuttle to a full-capacity transit bus. If you are not sure which platform to choose, the CX2 is the safest starting point because it adapts to the widest range of operations.

Blue Bird FX2: Maximum Capacity

The FX2 carries the highest passenger count in the Blue Bird commercial bus lineup. It is diesel-only, built for operators who need maximum capacity on routes where propane or CNG infrastructure is not available.

Passenger capacity: Up to 52 passengers

GVWR: Up to 36,200 lbs

Fuel options: Diesel only (Cummins B6.7 200-300 hp)

Transmission: Allison 2500 5 speed automatic

Fuel tank: Standard 60-gallon, optional 100-gallon

Wheelbase options: 141, 169, 190, 211, and 232 inches

Width: 96 inches exterior, 90 3/4 inches interior

Height: 121 to 128 inches overall, 77 inches interior

The FX2 has the shortest wheelbase range in the lineup, starting at 141 inches. That makes it well suited to dense urban routes where maneuverability matters as much as capacity. It is also the platform Ross Bus has seen used for custom applications like ambulance conversions and specialty vehicles.

Side-by-Side Comparison

Which Blue Bird Commercial Bus is Right for your Fleet?

The RX2 is the choice for high-mileage transit operators who want rear-engine ride quality and CNG capability. The CX2 is the most adaptable platform, with three fuel options and seven wheelbase configurations. The FX2 is the capacity leader for routes that need the most passengers in a single vehicle.

All three platforms share the same body construction: bonded windows, tilted panoramic windows, zero maintenance fasteners, and a proven body design that Blue Bird has refined over decades. ADA-compliant wheelchair lifts, kneeling systems, and wheelchair securement systems are available on every model.

Ross Bus can help you spec the right bus for your operation. Call 1-800-587-9032 to speak with a fleet specialist, or browse our commercial bus inventory to see available units.

For the full purchasing guide covering route analysis, fuel decisions, and new vs. used considerations, read our commercial bus buying guide.