The causes and characteristics of rallies vary, but most financial theorists agree that economic cycles and investor sentiment both play a role in the creation and momentum of rallies. In general, information about a strong or strengthening economy, indicated by high employment, high disposable income, low inflation and high business profits usually ushers in a rally. The existence of several new trading highs for well-known companies also indicates a rally is occurring. It is important to note that government involvement affects rallies: Changing the federal funds rate or tax rates indirectly encourages economic expansion or contraction.
Unlike the requirements for the preceding Group A cars, manufacturers were no longer required to build "homologation specials" in order to meet approval. The base model did not need to have all the characteristics of the WRC car, as evidenced from cars such the Peugeot 206, 307, Citroën Xsara and Škoda Fabia, which during this period had no road car variant with a turbocharged petrol engine or four wheel drive. One of the requirements was a minimum length of 4000 mm; the standard Peugeot 206 had an overall length of 3835 mm and Peugeot had to produce at least 2500 units featuring extended bumpers to comply with the required dimensions.
When rallying really took off in the ’80s and ’90s it spawned a new type of performance car. These cars were built for tarmac and mud stages, so their road-going cousins were naturally well-suited to real world conditions. What’s more, they often had four doors, plenty of legroom and a boot (trunk) in the back. And the best bit? Pretty much anyone could buy one and, depending on how deep your pockets were, become Blomqvist, McRae, or Mäkinen.
These events were road races in all but name, but in Italy such races were still allowed, and the Mille Miglia continued until a serious accident in 1957 caused it to be banned. Meanwhile, in 1981, the Tour de France was revived by the Automobile-Club de Nice as a different kind of rally, based primarily on a series of races at circuits and hillclimbs around the country. It was successful for a while and continued until 1986. It spawned similar events in a few other countries, but none survive.
Most of the works drivers of the 1950s were amateurs, paid little or nothing, reimbursed their expenses and given bonuses for winning (although there were certainly exceptions, such as the Grand Prix drivers who were brought in for some events). Then in 1960 came arguably the first rallying superstar (and one of the first to be paid to rally full-time), Sweden's Erik Carlsson, driving for Saab.