Back in August, when General Motors gave the media a tour of its design studios to show off pieces of its upcoming lineup, one of the cars we saw was a compact four-door Buick sedan. That sedan was essentially a re-grilled and trunked version of the recently introduced Opel Astra, but GM did not say... 

There’s an odd bit of historical deja vu at work here. Back in the late ’60s and early ’70s, General Motors wanted to shift a few sporty-ish four-cylinder models from its Opel division into America, so they turned to their Buick dealers. This didn’t work out exactly as planned...