Did you know that the cobra is not one snake, but rather a family of snakes? In other words, that there are far more variations of this frightful animal than one? I didn’t, at least until I started to write this. There are at least six species that are usually included when you talk about cobras, notably the king cobra, which according to the definition of a “true” cobra would otherwise not count as one. That definition is limited to the Naja species, itself containing around 20 different types that you’ll find across large parts of Asia and some parts of Africa.
What these all have in common is being 1.5 to 3m long, able to raise around a quarter of their body and flatten their neck to appear larger than they are, and spit. The mechanism of that, which is apparently more a squirt than a spit, goes beyond this post, but the venom they deliver in this and other ways attacks the nervous system and can be deadly. As you’ve probably gathered by now, snakes is not one of my favorite animals. I like cars though, and I certainly don’t mind the one carrying the cobra name, as AC Cobra or Shelby Cobra. Without the risk of being spat at, let’s have a closer look at it this week!
To do so, we need to go back to our old friends at Bristol that I wrote about in a post earlier this year. That’s where it starts as you may remember that in the 50’s, the aeroplanec ompany that was to become Bristol was set on building a light, two-seated sports car, which they also did. It was referred to as the AC Ace and was powered by a two-litre, straight six derived from BMW and delivering around 130 hp, tuned to a bit more for racing purposes. Of course the car was light and given it also had quite an advanced independent suspension, it did really well in different European races at the time, although it didn’t win any major ones.
On the other side of the pond, Carroll Shelby’s career as a racing driver was coming to an end and his next one as constructor was about to start. Shelby was a living legend already then as one of the most successful racing drivers of the time, winning most of what there was to win at the time over in America. Now in the early 60’s he was starting off as a constructor and was looking for what he called “a winning bet”. It was over at Bristol in the UK that he found it. The Brits certainly didn’t mind because by this time, they had lost the rights to use the engine the Ace had been powered by and this at least created some demand for a car, the future of which was otherwise uncertain.
Shelby had seen the success of the Ace in Europe and now came up with the very American idea of trying to squeeze a V8 into it. The car already then looked like a slimmed down version of what the AC Cobra would later become, but just to get the context right, let’s remember that at 3.6 metres and 850 kg weight, this wasn’t really a car for which a V8 had ever been intended. AC did however send over an empty car to America where Shelby was just starting his relationship with Ford that would over the years develop into a very close one. Ford thus delivered the engines that Shelby squeezed into the car that he now started calling the Cobra.
The first V8 was a 260 c.i. (4.3l), which was quickly followed by a 289 c.i. (4.7l) second one. Shelby still didn’t feel the Cobra was fast enough though, and of course this was the time when in the US, there was really no substitute for cubic inches. In 1964 therefore, with what must have been a mighty shoe horn, Shelby finally stuffed the 427 c.i. (7l) legendary Ford V8 big-block into the Ace engine bay that had been, conceived for a 2-litre six-cylinder. In order to do so, he basically had to rebuild the whole car. The body was stretched, transmission and suspension were altered and moved but by 1964, the job was done. The “true” 427 AC Cobra was born, with only the windshield and trunk lid being identical to earlier cars.
It’s not fully clear how much power the 427 Cobra had, but Shelby believed it was around 550 hp with about 700 Nm of torque. For a rear-wheel drive car weighing in at just over 1100 kg, this meant a 0-100 km/h time of below five seconds, unseen at the time. Like the animal from which it took its name, the 427 Cobra could certainly both bite and kill you if you weren’t attentive, but much as animals such as the cobra fascinate us, the car certainly had the same effect on Shelby’s clients. Even if demand was healthy enough as it was, Shelby would use a few tricks to spur it further, such as taping a $100 bill to the dashboard and tell his passenger they could have it if they could grab it. Given he pushed the pedal to the metal at the same time, rumor has it that this marketing trick never even cost him $100…
Unfortunately the AC Cobra would only be built until 1968 when AC stopped producing the base body that was still required to build the car. In total only 998 cars were built between 1962-1968, about a third of these were 427 Cobras, and only 250 of these were street cars. Best estimates have it that around 100 of those are left today. You’re free to guess what those trade for…
The success of the Cobra was however such that already in the 70’s, different firms started to produce replica’s of the Cobra, something that goes on to this day. With time and improving technology, many of these are better cars than the original Cobra, which of course is completely irrelevant. There is no substitute for the original (or, to be honest, for cubic inches…), and if you push it hard enough, I’m quite sure the AC Cobra can also raise at least a quarter of its body as it takes off towards the horizon!









































































It was the search for a somewhat more successful car than the C-V8 that led to the Interceptor, Jensen’s by far most well-known car, presented in 1966. This time the design had been commissioned to the Italians at Carrozzeria Touring (another company that would go bust a few years later) and although certainly more convincing than the C-V8, it was definitely still quite original. The front looked like many sports car in the day, the rear which in the UK became known as the “fish bowl”, is rather reminiscent of the 70’s AMC Pacer (which was of course designed after the Interceptor). If the exterior isn’t to everyone’s taste the interior is much more so, with a selection and quality of materials that led to the Interceptor being compared to high-end brands such as Aston Martin, Bristol or even Rolls-Royce.
We’ll make a quick pit stop here for a small side story that I find a wonderful illustration of Jensen and British car industry of the time. Jensen in parallel to the Interceptor built another model referred to as the FF. That’s actually a historic car as it was the first non-SUV passenger car with four-wheel drive, and thus highly innovative for its time. Neither in the 60’s nor now however does it snow a lot in the UK so if you build a four-wheel drive car close to Birmingham, you have to assume it was also intended for exports. All good so far. It’s just that no one in the Jensen factory apparently thought about the fact that most of the world outside of the UK by now had the steering wheel on the left side. So the FF only came as right-hand drive. Let’s just say it wasn’t a tremendous recipe for export success…
Back to the Interceptor, which during the 10-year production came in three series with only subtle design differences between them but where the MK III was by far the most produced. The MK III also came with three different bodies: the most common “glass bowl” saloon, the much rarer and arguably better-looking convertible, and the ultra-rare coupé with a plexiglass rear. All three series had Chrysler big block V8’s and 3-speed automatic transmissions, but whereas the first two shared the same 6.3 litre, 325 hp V8 as the predecessor C-V8, the MK III had an even bigger, 7.2 litre engine, however at 285 hp with less power. This all had to do with the new US emission rules that limited the power of large engines quite heavily. Not only was the 7.2 litre engine less powerful, it was of course also heavier, and just a tad thirstier: apparently we’re talking 25-30 litres per 100 km (8-10 MPG) …
The convertible version of the Interceptor was presented in 1974 and is another example of Jensen’s risk-willingness or complete ignorance of the world beyond the UK, depending on how you see it. At this time most other brands were halting the development of new convertibles altogether, as it was widely expected that US safety authorities would enact a complete ban on open cars without roll-over bar. So Jensen was basically the only brand brave or foolish enough to launch a new convertible in this period. They were ultimately right given a ban was never enacted but they were kind of wrong anyway, since the whole company went bust only two years later, in 1976. By then they had produced about 500 convertibles, out of a total of some 6400 Interceptors.
Although the big block Chrysler engines were quite bullet proof, the fact that they all had carburettors and lots of them, didn’t make them any easier to run or service. The carburettors had to be adjusted frequently for optimal performance, apparently up to as often as every 1000-2000 km. Cooling was another issue Interceptors were known to struggle with and then there was of course the same issue as with all other cars in the 70’s – rust. You can certainly convert the engines to injection and upgrade the cooling system, an idea that some won’t like at all given the car is then no longer original. It will however be far more drivable, and thus possibly a solution for those preferring to spend time on the road rather than in the garage.
Cooling and carburettors aside, the Interceptor is known as quite a wonderful GT car, offering loads of 70’s luxury and charm typically for far less money than a comparable Aston or Rolls (who as we all know also tend to have an issue or two…). There aren’t many in the market which makes pricing uncertain, but good saloons tend to start somewhere around EUR 50′ with convertibles costing much more. If this wonderful example of British ingenuity combined with a dinosaur-engine of a type will certainly never see again, then please make sure that if you’re not mechanically talented, you know someone who is, and go for a car as perfect as possible, as finding replacement parts for an Interceptor risks being as hard as finding a UK prime minister who will stay longer than a few months!






























