1960s British Racing Cars Archives

The Lotus 25 was all about innovation. It was designed by Colin Chapman – charismatic top man at Lotus. In a quest to lower the nose of the car – in the interests of aerodynamics – Chapman envisioned a one-piece chassis. The previous car – the Lotus 24 – had been built around space-frame steel tubing. That was the standard, in ’61. The ’25’, though, allowed its aluminium shell to act as the frame. Not only was the ‘monocoque’ lower and narrower – it was stronger and lighter, too. Frame flex was substantially reduced. That also let the suspension function to better effect.

Chapman boxed clever! The ’62 season started with the old Lotus 24 on the grid – complete with its space-frame chassis. Early, non-championship races were a perfect opportunity to pull the wool over rival teams’ eyes. Come the Dutch GP, though – and the Lotus 25 was revealed! With master craftsman Jim Clark at the wheel, the new Lotus quickly established itself as the class of the field. It would have won the World Championship at the first time of asking – were it not for last-round reliability issues. The following season, though, saw no such slip-up. A record-breaking seven-win haul saw Lotus take its first world crown. They would repeat the feat, in ’65 – with the wider-wheeled ’33’. That was a great year for the Norfolk-based team … Lotus also won the Indy 500!

The synergy, then, between the 25 and Clark was an automotive marriage from heaven. They lit up the GP 1.5-litre era. Colin Chapman – the arch-innovator – had done it again. Chassis and frame technology had morphed into the modern era. F1 cornering would never be the same again!

The BRM H16 was far from F1’s most successful machine. But, it was one of the most unusual. And while points are not awarded to the most interesting cars, without them motorsport would be the poorer. For example, how about producing a V16 – conforming to F1’s new 3.0-litre size limit – by linking two 1.5-litre V8s? That is precisely what Tony Rudd – BRM’s engine designer – opted to do. Not the first idea that might pop into an F1 fan’s head, perhaps – but, it was a logical step. After all, BRM – British Racing Motors – already had said V8s at its disposal. All Rudd had to do was shorten them a tad, place one on top of the other – and marry them up. Unfortunately, Rudd was not in a position to rid the engine of its excess weight.

Rudd was inspired to build the V16 by Napier Dagger’s H24 aero engine. Rudd reckoned it was good for 600bhp, fully developed. Later, he would say he wished he had gone down the 12-cylinder route instead. But at the time, 16 cylinders seemed like the way to go. Gremlins got in from the get-go. Vibrations would be ironed out in one part of the engine … only to re-appear in another! The upshot was that the H16 car did not make it onto the grid until the end of the ’66 season. Reliability was duly improved For ’67. Unfortunately for BRM, it came at the expense of power.

The H16’s P83 chassis did not help. Like the engine it supported, it was heavy. A lighter 115 chassis replaced it – but that, too, was substantially heavier than its rivals. Jackie Stewart was a BRM driver, at the time. He did not exactly gush with praise for the H16. Its performance limits were too easy to find, he said. That made it hard for a driver to shine – even one of his calibre. At least the more challenging tracks – like Spa Francorchamps and the Nürburgring – levelled the F1 playing-field somewhat. The H16 motor did win a GP, though. However, it needed Lotus’ help to do it. In ’66 – while awaiting delivery of the Ford DFV motor – Colin Chapman hired the H16 engine to power the Lotus Type 43. Ironic, really, given Chapman’s obsession with weight-saving. Heavy as the H16 was, Jim Clark eased the Type 43 to victory – at Watkins Glen, USA. And in ’67 – for all his dislike of the H16 car – Jackie Stewart placed it second at Spa. And that was pretty much it, in terms of results. A real racing oddity, the BRM H16 made for great spectating. That said – as Stewart had pointed out – it was not always as much fun to drive!