I've owned a Mini deTomaso (only one "S" please") which was the Italian Job, applied to the Mini Cooper.

77bhp compared to 72 (dual carb like the old Minis, compared to the single carb version) a mere 770 Kg kerb weight and a hatchback meant I could actually move house in it - and I did, twice!
Jaguars were a gentleman's car, not only for the price and quality, but for the engineering behind the XK engines.
I know, I had a Series III Daimler Sovereign (1981 model) and she was a beauty, and the 6-inline sang like Pavarotti when revved beyond 3000 rpm!
As for MGs and Triumphs, it's the equivalent to the "Mustang Vs. Camaro Vs. Chargers" in the US

Both MG and Triumph insisted on the old OHV layout.
True, MG TC, TD and TFs were rail chassis, but the MGS was a monococque body, albeit with the 1500cc engine off the MG TF.
It was later upgraded to 1600ccs.
The MGB was the watershed car, it sported a much improved monococque (lessons learned from racing the MGA Twin Cams at LeMans) and the OHV engine was hopped up to 1800ccs for 92-94 bhp (SAE net).
Only the MkI MGBs had the 3-synchro gearbox, the later cars all shared a much improved 4-synchro, overdrie optional.
Triumphs ware a different breed; whereas MGs shared the "Type A" Austin engine off family sedans, Triumph TRs had dedicated engines which produced buch better horsepower.
See MGB GT (such as my own) and the Triumph GT6 (2000cc straight 6)