The TR3 succeeded the TR2 in late 1955 as Triumph's flagship sports roadster. In late '57 several new features were added and the resulting car is called the TR3A (although the badges still just say TR3).
The features included such luxuries as exterior door handles, a locking latch on the trunk, as well as a wider grille which makes it distinguishable from earlier models at a distance.
Under the hood of this Litchfield Green example would be an undersquare 121.5 cubic inch pushrod inline four breathing through a brace of SU carbs. With a compression ratio of 8.5:1, the output was a claimed 100 horsepower, which was quite adequate for a 2200-pound car.
You can see how tiny this thing is relative to the parking space. It's about the same length and height as an original Miata, but almost an entire foot narrower.
It's a dictionary-definition real roadster, too. My BMW Z3 may claim to be a roadster... it actually says as much on the scuff plates in the door sills ...but it has a built-in folding top, which makes it a convertible by definition and the scuff plates stolen valor.
The TR3, on the other hand, is a true roadster: an open car with only rudimentary weather protection. Namely, it has a sort of pup-tent apparatus of bows and sheeting that can be erected and snapped down in order to, notionally at least, divide the world into the part where it's raining and the part where it's raining a little less...provided you don't drive too fast and have the whole thing blow off the car.
The driver of this one made it out of Fresh Market and motored off just in time to not wind up wishing he hadn't left the top at home. Well, it might be stowed in the boot, I suppose.
Ah, the towel in the passenger seat! A standard roadster accessory, usually slightly redolent of mildew. It serves a variety of uses, from drying off the driver's seat after an unexpected sprinkling, to emergency backup windshield defogger, to privacy screen for stuff you leave in the passenger footwell while running into the store.
When Motor Trend tested a TR3 in 1957, it returned a 9.2 second zero-to-sixty time and managed a 16.9 quarter at 82mph, while returning a test average 23.1 miles per gallon. Price as tested was $2,625, or a bit over $31,100 in inflation-adjusted dollars.
The top and bottom photos were taken with a Canon EOS R and an RF 24-105mm f/4L IS zoom lens in May of 2026 while the middle two were snapped with a Nikon D800 and a 24-105mm f/4 VR zoom lens in July of 2022.







