Let's check out the highest specific engine output or in other words power / unit displacement. Of course, we will take a closer look only for series production cars powered by naturally aspirated engines.

10th Place: Audi R8 GT - 5.2 liter V10 FSI – 560HP (412 kW) and 540Nm (400 lb-ft). 0-100 km/h in 3.6 seconds, 0-200 km/h in 12.3 seconds and a top speed of 320 km/h (199 mph). The specific power / unit displacement is 108HP / liter.

Audi R8 GT (2010)
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9th Place: Lamborghini Gallardo LP570-4 Superleggera – 5.2 liter V10 – 570HP (419 kW) and 540Nm (400 lb-ft). 0-100 km/h in 3.4 seconds, 0-200 km/h in 12.0 seconds and top speed of 324 km/h (201 mph). The specific power / unit displacement is 110HP / liter.

Lamborghini Gallardo LP 570-4 Superleggera (2011)
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8th Place: Ferrari 599 GTO – 6.0 liter V12 – 670HP (493 kW) and 620Nm (459 lb-ft). 0-100 km/h in 3.4 seconds and a top speed of 335 km/h (208 mph). The specific power / unit displacement is 112HP / liter.

Ferrari 599 GTO (2011)
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7th Place: Lexus LFA – 4.8 liter V10 -  560HP (412 kW) and 480Nm (356 lb-ft) of torque. 0-100 km/h in 3.7 seconds and a top speed of 325 km/h (202 mph). The specific power / unit displacement is 117HP / liter.

Lexus LFA (2011)
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6th Place: Porsche 911 GT3 RS – 3.8 liter flat-six – 450HP (331 kW). 0-100 km/h in 3.6 seconds, 0-200 km/h in 13.3 seconds. Top speed 310 km/h (193 mph).  The specific power / unit displacement is 118HP / liter.

Porsche 911 GT3 RS (2009)
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5th Place: Ferrari F12 Berlinetta – a 6.3 liter V12 engine - 740HP (544 kW) and 690Nm (509 lb-ft). 0-100 km/h – 3.1 seconds and 0-200 km/h in 8.5 seconds. The top speed is over 340 km/h (211 mph). The specific power / unit displacement is 123HP / liter.

Ferrari F12berlinetta (2012)
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3rd Place: Pagani Zonda R – 6.0 liter V12 – 750HP (551kW) and 710Nm (526 lb-ft).0-100km/h in 2.7 seconds and the top speed is over 350km/h (218 mph). The specific power / unit displacement is 125HP / liter.

Pagani Zonda R (2009)
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3rd Place: Honda S2000 – 2.0 liter I4 – 250HP () and 218Nm (161 lb-ft). 0-100 km/h in 6.2 seconds and a top speed of 240 km/h (149 mph). The specific power / unit displacement is 125HP / liter.

Honda S2000 (2009)
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2nd Place: Ferrari 458 Italia – 4.5 liter V8 – 570HP (419 kW) and 540Nm (399 lb-ft). 0-100 km/h in 3.4 seconds a top speed of 325 km/h (202 mph). The specific power / unit displacement is 127HP / liter.

Ferrari 458 Italia (2009)
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1st Place: Caparo T1 – 3.5 liter V8 - 575HP (423 kW) and 420Nm (311 lb-ft).0-100 km/h in 2.5 seconds and a top speed of 330 km/h (205 mph). The specific power / unit displacement is 164HP / liter.

Caparo T1 (2009)
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