The Fv433 Abbot is probably the most different member of the family and not just because of its large turret and 105mm gun. To fill the self propelled gun role (ah, that's what the SPG stands for!) the Abbot had to have a completely customised hull made for it. Even the K60 power pack differs from the standard 432mk2's.

To accomodate the lower hull the radiators have had to be repositioned. Also a different ratio final drive has had to be fitted to handle the extra weight. Unlike most of the family they named the FV433 'Abbot', in keeping with the religious theme for SPG's, e.g, the American WW2 'Priest' and the British 'Sexton'.