FV433 Abbot Self-Propelled Gun, upgraded with a Cummins 5.9L 12-valve 6BT diesel engine and Allison 545 automatic transmission. This modern powertrain conversion makes this Abbot one of the most reliable and easy-to-maintain examples you’ll find — a perfect blend of British military history and modern diesel performance.
Unlike the original Rolls-Royce engine, the Cummins swap ensures parts availability, ease of maintenance, and straightforward servicing. Any competent diesel mechanic can work on it, using off-the-shelf components available nationwide. It’s the ultimate solution for anyone who wants a vintage tracked vehicle without the constant hassle of sourcing rare or obsolete parts.
The FV433 Abbot 105mm Self-Propelled Gun was developed by the British Army in the early 1960s as part of the FV430 family of tracked vehicles. Designed to provide mobile artillery support, the Abbot combined robust armor with a high degree of mobility and firepower. Powered originally by the Rolls-Royce K60 multi-fuel engine, it served with distinction through the 1970s and 1980s.
Today, the Abbot remains a sought-after collectible for its historical significance, manageable size, and unique driving experience — a true piece of Cold War history you can operate.
Engine Details – Cummins 5.9L 12V (210hp)
Full professional rebuild – all machining completed
Performance intercooler with 3” charge pipes (hot & cold)
K&N particulate 3-stage air induction system
Turbo actuator delete (higher boost)
Upgraded 24v steel braided turbo oil lines
Turbo and exhaust heat blankets
12-valve coolant bypass upgrade
Killer dowel pin fix completed
PDD adjustable keyed P-pump timing gear (advanced 18°)
Billet tappet cover
90lb PDD premium valve springs (intake/exhaust)
Stage 2 marine injectors – 90hp, 5-nozzle, 145° performance spec
High-output pistons (large bowl design)
High-flow water pump upgrade
Oil filter sandwich plate with ports for additional coolers, oil PSI & temp sensors
CAT oil filter upgrade
Transmission
Allison AT545 “Xcalabur Bulletproofed” performance upgrade
Kickdown delete for simplicity
custom crossover box (gear driven)
This configuration delivers outstanding torque, reliability, performance while maintaining the original Abbot look and feel. The conversion was completed to a very high standard — ready for collectors, museums, or enthusiasts who want something turnkey and usable.
If you’re looking for an Abbot that runs like a modern diesel truck but retains all its original military character, this is the one.
Price: $70,000
More info: Click here to see original eBay auction and get more information (Affiliate link)
Seller's other items: tankamerica (Affiliate link)
Location: Orlando, Florida, United States
