AFTER sweeping past a significant milestone, drivers rarely slam their vehicles into reverse. Yet General Motors (GM), which last year joined Toyota and Volkswagen in an elite group that sells over 10m vehicles a year, may be on the brink of such a manoeuvre. On February 14th the American firm and PSA Group, which makes Peugeots and Citroëns, sprang a surprise by confirming that they were in talks that could lead to the French carmaker buying GM’s European operation. GM’s decision to downsize has many merits, but the advantages of getting bigger are much less clear-cut for its European counterpart.

The two carmakers say a deal for Opel (which carries the Vauxhall brand in Britain) is only a possibility. But GM’s global might is not reflected at Opel, and it is probably keen to offload a carmaker that it has owned for nearly 90 years. Opel has done little other than disappoint in the recent past. Its 6% share of the European market puts it behind seven other brands and the business has lost money for years.

GM has considered offloading Opel before. In 2009, as it struggled in bankruptcy protection in the wake of the financial…Continue reading