CEO of Lamborghini, Stephan Winkelmann, is hinting at the possibility of a third model in the supercar maker’s lineup, possibly a four-door car in the mould of the Porsche Panamera and Aston Rapide, but only if it improves sales and gives “a real leap” in deliveries.

“A third model would fit Lamborghini very well. A four-door car would be a very feasible approach,” the 45-year old CEO said at Lamborghini’s Sant’Agata base.

Remember the four-door Estoque concept? It was unveiled at the 2008 Paris Motor Show and featured a 560 hp 5.2-litre direct injection naturally aspirated V10 engine producing 540 Nm of torque. That 5150 mm long “4-door 4-seater super sedan” caused many mouths to gape, but we haven’t heard much news of it making production so far.

The economy is gathering pace with most luxury brands recording good sales, which could be tempting Lambo. Sales in the US may jump 70% for the $200,000 to $400,000 category this year after falling 37% in 2009, according to researcher IHS Automotive. BMW owned Rolls-Royce this week posted record first-half sales of 970 units thanks to demand for its “baby” Ghost.