To limit power, all forced induction cars were fitted with a 34 mm diameter air restrictor before the turbocharger inlet, limiting the air flow to about 10 cubic meters per minute. The restriction was intended to limit power output to 300 hp although some WRC engines were believed to produce around 330–340 hp. Engine development did not focus on peak power output but towards producing a very wide powerband (or power curve). Typically, power output in excess of 300 hp was available from 3000 rpm to the 7500 rpm maximum, with a peak of 330–340 hp at around 5500 rpm. At 2000 rpm (the engine idle speed in "stage" mode) power output was slightly above 200 hp.
Colin McRae began his competitive career in motorsport riding trial bikes at an early age, despite being more interested in four wheeled machines rather than two wheel bikes. At the age of sixteen, through the Coltness Car Club, McRae discovered autotesting, he soon traded his bike for a Mini Cooper and started competing. A year later, he began to negotiate with another club member to use his Hillman Avenger for the Kames Stages, a single-staged rally venue not far from McRae's home. McRae finished the event fourteenth; first in his class although he had run most of the event in a higher position.
However, if you are heading for a spin around your favourite backcountry twister, then there are few cars better suited. Independent suspension all-round, a turbocharged 230hp 2.0-litre engine and all-wheel drive, mixed with the early signs of Ford’s newfound commitment to handling, meant the Cosworth would devour pretty much any flavour of road in its path.
This particular era was not to last. On the 1986 Rallye de Portugal, four spectators were killed; then in May, on the Tour de Corse, Henri Toivonen went over the edge of a mountain road and was incinerated in the fireball that followed. FISA immediately changed the rules again: rallying after 1987 would be in Group A cars, closer to the production model. One notably successful car during this period was the Lancia Delta Integrale, dominating world rallying during 1987, 1988, 1989, 1990, 1991 and 1992 – winning six consecutive world rally championships, a feat yet unbeaten.
1968 brought the first of a series of British-organised intercontinental rallies, the Daily Express London-Sydney Marathon, which attracted over 100 crews including a number of works teams and top drivers; it was won by the Hillman Hunter of Andrew Cowan/Brian Coyle/Colin Malkin. Not to be outdone, the rival Daily Mirror sponsored in 1970 the London-Mexico World Cup Rally, linking the stadia of two successive football World Cups, on a route that crossed Europe to Bulgaria and back before shipping out from Lisbon to Rio de Janeiro, after looping around South America, and a run through some of the most frightening sections of Peru's road race, the Caminos del Inca, they wrap it up being shipped to Panama and a final run up Central America. The Ford Escort of Hannu Mikkola and Gunnar Palm won. These were followed in 1974 by the London-Sahara-Munich World Cup Rally, and in 1977 by the Singapore Airlines London-Sydney Rally.
What do you do when you're Mercedes-Benz in the late 1970s and you want to go rallying, but your sportiest car is a luxury cruiser that isn't very sporty? You take the C107 SLC Coupe rallying anyways. In an era dominated by nimble cars like the Lancia Stratos and Ford Escort, the 450SLC must have been quite a sight, but Mercedes actually had some competition success. Mercedes won the 1978 South American rally and was able to get 4th place in a Manufacturers Championship.
Rising investor confidence also indicates a rally, and it is perhaps more powerful than any economic indicator because when investors believe something is going to happen (a rally, for example), they tend to take action (purchasing shares in order to profit from expected price increases) that actually turn expectations into reality. Although it is an objective concept, investor sentiment shows through in mathematical measurements such as the put/call ratio, the advance/decline line, IPO activity, and the amount of outstanding margin debt.