With its emphasis on luxury cars of the 1930s, the Pebble Beach Concours d'Elegance in Monterey, California can usually be relied on for at least one completely outrageous art-deco concept from a domestic auto company - and this year it's General Motors' turn, with the Cadillac Elmiraj.
According to GM design boss Ed Welburn, the Elmiraj is a modern take on the classic format of a two-door, four-seater grand coupé, a pure expression of streamlined design and rear-wheel drive performance.
At 5207mm overall length, grand is exactly what it is, a statement of pure luxury and presence. The concept is also a runner, with a 4.5-litre biturbo V8 delivering an estimated 373kW and 678Nm, using the technology from the upcoming CTS Vsport 's Twin Turbo V6 in a classic V8 format for the first time.
With its windscreen set way back from the front wheels - a Cadillac signature - a long wheelbase and a clean profile with just one feature line in the sheet metal extending the full length of the body from head to tail lights, it's a mature design rather than a boy racer, emphasising poise and proportion.