Porsche is actually built of CARDBOARD - PHOTO

But Austrian Johannes Langeder, 48, is still delighted with his life-sized pedal-powered eco-friendly car, which cost €13,000 (£11,000) to build.  This week he took the car out for its first trip around the city of Hamburg, in northern Germany and pointed out that not only is it the quietest vehicle on the road, it also has zero emissions, making it the most environmentally friendly Porsche ever.'It has 24 gears which is pretty impressive, and at the end of the day I am finally driving around in a Porsche,' he said.  Special features inside the two-seat vehicle include a rear wing and massive air inlets on the front spoiler to help with aero dynamics and 'save the driver from sweating too much'. The car's base is made of steel-frame but the rest of the vehicle is made of plastic tubes, aluminium foil and rolls and rolls of tape. It took Mr Langeder took 6 months and 1,000 hours to build in a garage. Unlike its mechanical counterpart which costs £129,950 and does 0-60 in 3.7 seconds, the model does not have a twin-turbo or produce 450bhp from a 3.6-litre air-cooled flat-six engine. It is entirely man-powered - thanks to a bicycle fitted underneath the hood and can reach a top speed of 10mph.And with its extra quiet engine his Ferdinand GT3 RSX, also attracts plenty of attention from the police, who stopped him on at least one occasion to give the car a thorough check before ruling the paperwork was in order, and allowing it to carry on. The motor also has the ability to reverse, but only in the same way that Fred Flintstone manages it - by putting his finger on the floor and pushing backwards. Mr Langeder decided to build the Porsche when he realised it was legal to 'drive' the pedal-powered car on Austrian roads.He said: 'It is treated like a bicycle by the law and I wanted to show that a car needed no fuel. 'I wanted to build a car that accords with my idea of future. There are no original parts.' 'The most impressive feature is its extreme slowness - everyone on the street is faster than you. 'You are no enemy to other road users and the slowness is a kind of luxury. 'Most car drivers need a second look before they realise it is technically a bicycle. 'Most of them are very enthusiastic and get their cameras out.'  Mr Langeder, originally from the northern Austrian city of Linz built the car in 2010 and it has since notched up plenty of mileage before he finally drove it to the local museum in Hamburg as part of an exhibition on bikes.(dailymail.co.uk)ANN.Az