Description
The Bolesworth Castle March 2025 Classic & Performance Car Auction
Sunday, 09th March 2025.
1931 Austin Seven Ulster
A very rare and correct supercharged car
Registration – JR 4525
Chassis No. – 130963
M. O. T. – Exempt
Odometer – TBC
Colloquially named the “Ulster” ‘JR4525’ is officially an Austin Seven Super Sport from 1932. The “Ulster” name was given to the Super Sport and its non-supercharged Sport sibling due to their racing successes on the Ards street racing circuit in Ulster. ‘JR4525’ is a vanishingly rare model with less than 100 supercharged cars thought to have been built. What’s more ‘JR4525’ features its correct and original Cozette No. 4 supercharger. ‘JR4525’ has had just four former keepers and has been in the stewardship of its current owner since 2019. It was taken on as an unfinished project at that stage and brought up to standard from there. To underscore its mechanical condition, ‘JR4525’ took part in the Austin Seven Centenary Parade at the British Grand Prix at Silverstone in 2022. ‘JR4525’ was piloted by F1 driver Yuki Tsunoda around the iconic Silverstone circuit. An amazing survivor from the heyday of British motorsport.
‘JR4525’ features the recognisable and utterly charming aluminium “boat tail” body which remains unpainted but rather in its polished alloy glory. Apart from this distinctive feature the Ulster is notable for its V-shaped entry apertures in lieu of doors and its high mounted external exhaust pipe with delightful perforated fishtail finishing piece. At the front a brass radiator cowl features together with a temperature gauge radiator topper. Other characterful period features include the big, frosted glass external headlamps, leather boot and bonnet straps and alloy framed glass fly screens. The vendor rates the external condition as “excellent.” The focussed cabin is minimally furnished. A pair of black upholstered seats with box pleated backs sit either side of the transmission tunnel. The white on black gauge set extends across the full width of the fascia and a Bakelite, three spoke steering wheel with alloy boss also features. The vendor rates the cabin’s condition as “good.”
‘JR4525’s’ mechanical specification was impressive for the times. That Cozette No. 4 supercharger really transformed this lightweight car’s performance. Other original mechanical enhancements include an additional water pump and Pheonix crankshaft and rods. This set up is mated to a 3-speed, close ratio sports gearbox and a rear axle with a 4. 9:1 ratio. It is thought that this configuration originally endowed this little racer with a top speed approaching 90 mph.
In summary:
· A supremely rare boat tail Ulster with original Cozette supercharger
· Offered in a highly original and beautifully presented condition
· Part of the Austin Seven Centenary Parade at Silverstone in 2022
This Car has been entered into Hampson Auctions, The Bolesworth classic and performance car and motorcycle auction, which will be held at Bolesworth Castle, Tattenhall, Chester, CH3 9JJ on Sunday 09th March 2025.
Viewing sessions will take place at Bolesworth castle from 9am - 7pm on Saturday 08th March and from 9am - 12:00 on Sunday 09th March, with the auction itself commencing at 12pm on Sunday 09th March, and you are very welcome to join us there.
Prospective buyers can bid in the room, online, over the telephone or via commission – please contact Hampson Auctions directly if you would like to arrange one of the latter two options, or if you would like to request a condition report.
The auction catalogue so far is available to view via our website.
Auction entries are currently still being accepted, if you have a vehicle which you would like to consign, please contact us.
£30000 - £35000
Buyer's Premium 12. 5%
