In an attempt to cut costs, since 2006 new regulations required mechanical front and rear differentials, while the central differential remained active. Active suspension and water injections were also prohibited. Cars entered by a manufacturer had to be equipped with the same engine for two rallies; further limitations were imposed on the changing of some parts, including suspension, steering, turbochargers and gearboxes.
A typical rally course consists of a sequence of relatively short (up to about 50 km (31 mi)), timed "special stages" where the actual competition takes place, and untimed "transport stages" where the rally cars must be driven under their own power to the next competitive stage within a generous time limit. Rally cars are thus unlike virtually any other top-line racing cars in that they retain the ability to run at normal driving speeds, and indeed are registered for street travel. Some events contain "super special stages" where two competing cars set off on two parallel tracks (often small enough to fit in a football stadium), giving the illusion they are circuit racing head to head. Run over a day, a weekend, or more, the winner of the event has the lowest combined special and super special stage times. Given the short distances of super special stages compared to the regular special stages and consequent near-identical times for the frontrunning cars, it is very rare for these spectator-oriented stages to decide rally results, though it is a well-known axiom that a team cannot win the rally at the super special, but they can certainly lose it.
On 27 September 2008 the Colin McRae Forest Stages Rally took place in Perth, Scotland. An enhanced entry list of several former big name rally drivers took part in memory of Colin. The impressive entry list included ex-World Championship drivers Hannu Mikkola, Ari Vatanen (partnered by his 1981 WRC winning co-driver David Richards), Björn Waldegård, Stig Blomqvist, Malcolm Wilson, Russell Brookes, Jimmy McRae, Andrew Cowan and Louise Aitken-Walker, many competing in their original cars. A handful of current WRC drivers also took part including Matthew Wilson, Kris Meeke and Travis Pastrana. The event was deemed a great success, attracting record spectator numbers to the Perthshire forests. Outright winner was Stobart VK M-Sport Ford Rally Team driver Matthew Wilson in a Ford Focus WRC. Fittingly, Colin's brother Alister McRae won the classic category.
You might think a delicate French car built for comfort and comfort alone doesn't belong in rally, but you'd be wrong. The Citroën DS' hydraulic suspension, designed to iron out bumps on the road, worked beautifully on rough rally stages. It won the Monte Carlo Rally in 1959 and 1966 and was competitive up until the mid-1970s, just as DS production ended. Pretty good for a big, temperamental luxury car.
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.