It is true that the TVR 2500 M is the 1970s sports car from Blackpool that was produced in the largest number, namely a total of 947 units. Most of these coupés were exported to the USA in order to comply with Californian emissions regulations, as the Triumph TR250, which supplied the engine for the TVR 2500 M, was already on the road in the United States.
Attentive Zwischengas readers have already been informed about the TVR 2500 M several times. Perhaps the interest in how many of these cars are still in our latitudes is correspondingly great.
I myself saw a TVR for the first time in 1974 in the catalog issue of "Sport-Auto 12/1974", it was the 3000M. I never let go of this brand after that. As chance would have it, I came across a TVR dealer (Caterham Car Sales) on Finchley Road during a short stay in London in the spring of 1976. There I stood in front of a yellow 3000M for the first time. After asking the asking price, I went back to Switzerland "doing the math". Shortly afterwards, I returned to London with the desire to buy the car. Unfortunately, this "yellow" 3000M was already gone - but there were others, including a 2500M (from the first series built in 1972), which I bought immediately.
At the end of 1977, I dismantled the TVR into all its individual parts, leaving only the starter motor, because I couldn't loosen the screws, and the windshield wiper, which I wasn't very interested in, in one piece. It was exactly the right time, because the rust on the tubular frame and other steel parts was already so far advanced that the corrosion could still be easily removed. The tubular lattice frame was sandblasted and spray galvanized, then painted white with the appropriate pre-treatment and special paint. All other steel parts were also sandblasted, galvanized and given a clear coat. Where possible, axles, bolts and other parts were replaced with stainless steel.
The engine was given a complete overhaul and the compression ratio was raised to 10.5:1. With three Weber 40 DEOC carburetors and a new exhaust system, the in-line six-cylinder ran much better and you could hear it too. The entire electrical system was also rebuilt.
Almost 50 years later, everything is still almost as good as new, and dirty parts can be cleaned without much effort. As can be seen from various reports, the TVR 2500M was said to have high fuel consumption (up to 21.9l/100km). After the measures taken from 1977 to 1979, it is quite difficult to achieve a consumption of over 10 liters per 100 km. On average, over a large number of fill-ups, consumption was between 7 and 8 liters per 100 km. I can't give any more precise information about the power, which is stated as 105 kW in the vehicle registration document, only that it is not possible to determine the maximum speed, but 6000 rpm can be easily achieved in 4th gear (the piston speed of 19 m/s then reaches its limit), which was practically impossible in the past. Comparisons show that my 2500M can easily keep up with a 3000M or even a TR6 Injection.
After a longer stay abroad and after almost 17 years of standstill, it was possible to get the car back on the road with comparatively little effort (CHF <3000.00 incl. MFK). Cheers! Finally able to go on trips again, including the Susten Pass, unfortunately with far too much traffic, and recently the Gurnigel route, this time practically alone and therefore a bit more racy. It was just great fun!
After the restoration, there were actually no more serious breakdowns.
Of course, maintenance such as inspection, servicing and, if necessary, repairs on a car like this poses completely different challenges than you would expect from a modern car. For example, it is advisable to carry out a general inspection of the entire technology after two or three longer trips. This involves tightening all the screws, examining any problem areas more closely and, if necessary, replacing them. It is worth investing half a day in between, as this allows you to identify and rectify any problems at an early stage before a "breakdown" occurs.
All this is made considerably easier with a good knowledge of the car and an understanding of automotive technology in general. A well-equipped garage (home base) is also helpful. I couldn't imagine being completely dependent on garages, especially as those who are really knowledgeable about cars like this are pretty rare.
Nevertheless, I was very lucky to find a specialist at my new place of residence after returning from abroad who was able to help me with the revival. It was the touring garage in Gamsen. The car was transported to the garage, a thorough service/repair (brakes) was carried out and the MFK was successfully passed.
The beginnings of my relationship with the TVR 2500M were not easy. Leaking radiator immediately after purchase on the drive home (Sunday), an empty cooling system on a long downhill drive, which indicated a defective cylinder head gasket. As the water temperature continued to be a problem thereafter, the whole thing had to be looked at more closely, and the installation of an oil temperature gauge helped. Lo and behold, the oil temperature soon reached 70 - 80 degrees, and after a few kilometers on the freeway it very quickly reached 120 to 130 degrees. The installation of an oil cooler solved this problem.
I was satisfied with the performance when I bought it, so I simply took note of the fuel consumption. When driving through a gallery, I could hear a terrible hissing noise in the exhaust, which indicated that the exhaust had a much too small cross-section. The sudden failure of the entire electrical system on the Gotthard on the old road in fog, rain, darkness and heavy traffic was also very surprising. Only the hazard lights and the fan heater were still working, everything else was dark. So we opened the hood and closed it again - it wasn't clear what we were looking for. And suddenly everything was back to normal and we were able to continue our journey. This incident was repeated two more times, always the same. The fault could not be found even after disassembly.
On the occasion of the participation in the TVR Continental Meeting in Zolder in 1980, after the major restoration in the years 1977 to 1979, a defective cylinder head gasket stopped the joyful laps on the Ring, later on Saturday afternoon. While looking for a replacement gasket, the dealer we were lucky enough to find told me that I had fitted the wrong one and gave me the correct gasket. The change was made on Sunday in the hotel parking lot and then I was able to start my journey home to Switzerland.
One Friday evening in 2004, I had arranged to meet up with a friend. As I was waiting for the green light at a traffic light in Visp, a car hit me full force in the rear and pushed me into the car in front. I was able to get a new rear section and a new hood in England (Davis Gerald) without any problems. Fortunately, the new hood also had the air intakes, but the air intake at the bottom was no longer the same as on subsequent models.
Although the open TVR 3000S came onto the market a few years later after I bought the TVR in 1976, it never persuaded me to part with the TVR 2500M. It is simply the "driving machine" for me and I hope it will stay that way for a long time to come.