Duetoregulationchanges,theRB4lookeddifferenttotheRB3,butitwasasimilarmachinewiththeTeamdevelopingandprogressingthedesignoftheRB3whilstalsotryingtoimprovereliability.PoweredagainbyaV8Renault,theRB4stillsuffered.MarkWebberwasabletoscorepointsinhalfoftheseason'sracesandDavidCoulthardonlyscoredtwice.