Change visitor typeVPA-R Specification
ROTOTEST VPA-R44 4WD Specification
Maximum system performance
Braking power
2WD (R4)409 kW (548 imp hp)
4WD (R44)818 kW (1097 imp hp)
Braking wheel torque
2WD (R4)1800 Nm (1328 lb-ft)
4WD (R44)3600 Nm (2655 lb-ft)
Vehicle speed*
2WD (R4)319 km/h (198 mph)
4WD (R44)319 km/h (198 mph)
Wheel speed
2WD (R4)2600 1/min
4WD (R44)2600 1/min
* 650 mm (25.59 inch) wheel diameter
Measuring accuracy
Speed accuracy
2WD (R4)0.1 1/min
4WD (R44)0.1 1/min
Torque accuracy
2WD (R4)± 0.1 % FSO typ / ± 1 % OMV
4WD (R44)± 0.1 % FSO typ / ± 1 % OMV
Complete turnkey system
Dynamometer units, VPA-R444
Vehicle–powered Cooling & Fan Units, CFU4
System Central Unit, SCU1
Operatorīs PC, monitor and keyboardincluded
Wheel adapters, bolts and nuts4
Hydraulic hosesincluded
Electrical cablesincluded
Calibration equipmentincluded
Complete oil fillincluded
Control system test modes
Constant speed
System controls speed to a pre-set value independent of load.
Constant Torque
Systems controls torque to a pre-set value independent of speed.
System controls acceleration between two pre-set speeds.
Road Load Simulation (Optional)
Simulates road resistance caused by aerodynamic drag, rolling resistance and incline.
Calibration report (Optional)
VPA-R Acceleration Simulation Module, ASM (Optional)
Simulates real-world accelerations defined by inertia, aerodynamic drag and rolling resistance.
Transmission package (Optional)
Different wheel speed
Different wheel torque
Wheel spin simulation
Real time display
All data are displayed in real time as analogue and digital values and sweep charts.
Calibration and verification
Calibration of load cell using dead weights.
Measurement and Analysis tool
Stores measurements in an open, readily available format. Analyse of data in tables or graphs. Automatic correction (optional) or conversion of power and torque values.
Project manager (Optional)
Maximum axle load
2WD (R4)2000 kg (4409 lbs)
4WD (R44)2000 kg (4409 lbs)
Axle height
2WD (R4)325 mm (13 inch)
4WD (R44)325 mm (13 inch)
Power requirements240 VAC / 110 VAC
Water requirementsNone (air-cooled)
Operating environment
Temperature range+15 °C to +40 °C
Extended temperature range (Optional)-15 °C to +40 °C
Arctic Protection (Optional)-40 °C to +40 °C
Relative humidity10 to 90 % non–condensing
System Central Unit expansionOne 4WD to two 2WD
Data acquisition system, sensors included.
Noise, Vibration and Harshness torque signal
ROTOTEST VPA Sound Insulation
Water/oil coolers
Set of calibration weights
Wheel adapters, bolts and nuts
"MC mode", one unit in operation
One VPA unit in passive mode
ROTOTEST VPA-R Arctic Protection
Extended Temperature range-15 – 40 °C
This information is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability, fitness for a particular purpose, or non-infringement.

The information herein may include technical inaccuracies or typographical errors. Changes may periodically be made to the information and will be incorporated in new editions of this document. Rototest AB may make improvements or changes in products and programs described in this publication at anytime without incurring any obligations.