There are two main forms: stage rallies and road rallies. Since the 1960s, stage rallies have been the professional branch of the sport. They are based on straightforward speed over stretches of road closed to other traffic. These may vary from asphalt mountain passes to rough forest tracks, from ice and snow to desert sand, each chosen to provide an enjoyable challenge for the crew and a test of the car's performance and reliability.
The causes of rallies vary. Short-term rallies can result from news stories or events that create a short-term imbalance in supply and demand. Sizeable buying activity in a particular stock or sector by a large fund, or an introduction of a new product by a popular brand, can have a similar effect that results in a short-term rally. For example, almost every time Apple Inc. has launched a new iPhone, its stock has enjoyed a rally over the following months.
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.
Following his win at the Brands Hatch meeting of the 2007 World Touring Car Championship season, Andy Priaulx dedicated it to McRae, commenting that his death "shows how fragile life can be". McRae's former rival, four-time World Rally Champion Tommi Mäkinen commented the helicopter accident as terrifying news, and described McRae as "a pleasant fellow and a tough rival". Valentino Rossi, who was taught the basics of driving a rally car by McRae, said he was shocked and saddened by the sudden departure of the former World Rally Champion. Valentino dedicated his win at Estoril MotoGp in 2007 to Colin McRae saying to the media "I want to dedicate this to Colin McRae. He was one of my big idols when I was very young and it's because of him I have a big passion for rally".
In February 2015, The National Film & Television School in England premiered one of their graduating films called "Group B" directed by ex-rally driver Nick Rowland. The film, set during the last year of the Group B class of rally tells the story of a young driver having to face a difficult comeback after a 'long and troubled absence'. The young driver is played by Scottish actor Richard Madden, and his co-driver played by Northern Irish actor Michael Smiley.
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.