Despite the fact that plans for the TR4 were well underway by 1960, the ever present problem of insufficient funds led Triumph management to question the wisdom – and financial viability – of replacing the TR3A with Michelotti’s TR4.
An alternative was proposed that would have been much cheaper (and far less effective) to implement and was based on a revised TR3 that used the rack-and-pinion steering designed for the TR4 along with the larger engine and an increased track. The Triumph TR3 Beta was the result and appeared like a standard TR3 had been given growth hormones or a higher calorie diet.
A new, wider body was fitted to a TR3A with a new grille and wider fenders (to accommodate the increased track) that resulted in a much stockier sidescreen Triumph roadster. A better plan (that was also considered) would have fitted the car with the Sabrina Twin-Cam engine to create one of the fastest cars in its class.
After further discussion and more thought, the correct decision was made to go ahead with the TR4 due to its greater modernity and luxury (even Healey would soon abandon side curtains) and the two Triumph TR3 Beta prototypes were abandoned to the dustbin of history.