It can be built with bodies up to 13 m (42 ft 8 in) long and a maximum gross weight of 19,000 kg (42,000 lb).

The B9R is equipped with a rear-mounted Volvo 9.0-litre 6-cylinder diesel engine under the floor, producing 380 bhp (283 kW; 385 PS) and torque of 1,700 N⋅m (1,254 lb⋅ft).

[1] The Plaxton Panther is built on the B9R chassis and provides 53 seats.

[2] The Sunsundegui bodywork provides a 55-seat arrangement.

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