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Isambard Kingdom Brunel

In two days' time it will be 200 years since the great Victorian , Isambard Kingdom Brunel was born. There is much to celebrate, not least a public profile that today's engineers would kill for. Immediately recognisable with his stovepipe hat, cigar and frockcoat, Brunel came second only to Winston Churchill in the BBC's 2002 Greatest Briton survey. That's impressive in a nation whose idea of an engineer is someone who comes to fix your washing machine.

Compared with today's engineers, Brunel was incredibly versatile. He was so much more than an engineer. He was a visionary, able to persuade people to finance his projects even after earlier ones had failed. He took on the design of every last detail of his projects - from tunnels to ships to railways - then he built them. Finally, he operated them. There is no comparison to today's PFI projects, which are all about minimising risk. Brunel's undertakings were unheard of in their scope, and it took great courage and determination to pull them off - or to fail in trying.

The Great Western Railway linking London to Bristol is an excellent example of what he was capable of. He designed everything including the bridges, tunnels, Paddington and Temple Mead stations, then built the whole thing. Being Brunel, it had to be much, much better than anything else around so the gradients were flatter, the tunnels more commodious and the bridges more daring than anything built previously.

"It was an amazing feat. Most people only ever went about 10 miles from their homes," says Chris Wise, director of Expedition E E Engineering. "He took people straight from the medieval to the industrial age as he cut the journey time from London to Bristol from two and a half days to two and a half hours."

Having built the GWR, Brunel then wanted to shrink the whole world. The railway was part of a much grander Brunellian vision that saw London linked to the USA. Brunel built the docks at Bristol at the end of his railway line and concentrated on building the biggest, fastest ship ever to sail from those docks so people could get from London to New York in two weeks.

Brunel's professional heirs mourn the loss of a golden age, when an engineer could embody society's deepest aspirations. It was a big responsibility and it pushed Brunel to exercise what turned out to be an extraordinary range of abilities. "Today engineering is a victim of its own success as no one person can do all of these things," says Brunel historian Angus Buchanan. Unfortunately nor do people want to. Where once "people were queuing up from nice middle-class backgrounds to work in Brunel's office to get the qualifications needed to be a civil engineer", says Buchanan, today the status of the engineer has declined to the extent that it attracts few passionate recruits.

Still there is plenty of evidence around of the man's enduring legacy and over the next few pages we identify some modern projects that embody Brunellian characteristics.

Two tunnels

Brunel鈥檚 approach was to starve all contractors of funds to keep them subservient

Tony Bingham, barrister

Many of Brunel's projects were ground-breaking and involved taking enormous risks. If he hadn't staked his personal reputation and other people's money on these projects, Britain would not have been able to boast the fastest railway and ships in the world. Inevitably there were failures and financiers lost everything. In today's risk-averse environment it is hard to identify anything remotely comparable.

Except, perhaps, the Channel Tunnel. Not only was it Brunellian in its vision in that it linked Britain with France for the first time: it was also Brunellian in its financing. Ending a long period of bold, publicly funded infrastructure projects, the Channel Tunnel was paid for from the life savings of many small investors.

It has parallels with several of Brunel's projects including the tunnel under the Thames that linked Wapping to Rotherhithe in east London. Designed by Brunel and his father Marc, it was the first tunnel to be built under a navigable river. Like the Channel Tunnel it took much longer to build than planned and ran into financial difficulties. There was no money left to build the ramps needed for horses and carts - similarly, it has taken 15 years since the Channel Tunnel was opened for a high-speed link to be completed in Britain.

Like many of Brunel's investors, Channel Tunnel financiers saw their shares decline - from 800p down to 28p today. The ferry companies fought back and the predicted levels of car and freight traffic that never materialised. But Brunel's legacy tends to slide off the profit and loss sheet. His tunnel was a loss-making pedestrian convenience before meeting its destiny as an essential Tube route. The Channel Tunnel investors may never get their money back but at least we have a high-speed link between London and Paris.

Technological feats that compare with Brunel鈥檚 - the Channel Tunnel

Globalisation

Brunel thought big. His SS Great Britain was the largest ship in the world when it was built in 1845. Suitably warmed up, he went on to build the SS Great Eastern, 693 feet long and, at 18,900 tons, five times heavier than any other ship on earth. He lived to see it carry 4000 passengers and their goods to Australia without stopping. The modern equivalent of this is air travel, and there are two, linked contenders that echo his vision.

Heathrow's T5 is on a scale Brunel would have approved of. Passengers at T5 will be able to board the Airbus A380, the largest passenger aircraft in the world, capable of carrying up to 800 passengers. It comes into service later this year and Airbus must be hoping its plane doesn't share the same fate as the SS Great Eastern, which failed to attract enough passengers.

Amazingly, he did all these great projects with only 36 directly employed people

Chris Wise, director of Expedition Engineering

A hit and a miss

Technical innovation was another Brunellian hallmark. "The man was a compulsive innovator," says Gordon Masterton, president of the Institution of Civil Engineers. "Everything he picked up he wanted to do differently." Indeed, Brunel was prone to overdoing the innovation. For example, his atmospheric railway eliminated the need for a heavy locomotive - in theory. It had a pipe running between the rails that moved the train using pressure, but couldn't be made to work properly. It was closed down after six months and the investors lost their money.

But when Brunel got it right the results were stunning. His SS Great Britain was the world's first ocean-going wrought-iron ship to use a screw propeller, at a time when the sensible choice was paddle wheels. "After innovation, the second-greatest contribution Brunel made was research and development," says James Dyson, chairman of the eponymous vacuum cleaner company. "With the propeller, Brunel took the design and progressively refined it by adding elements, seeing if it made a difference, until it was near-on 92% efficient."

Today, a similar rigour can be seen in human genome research (though one likes to think that if Brunel were alive he'd have turned it into a cure for cancer by now).

Beautiful bridges

If one single modern-day, project stands out for having the most Brunel-like characteristics, and for encapsulating his ability to perfectly combine engineering with architecture, it is the Millau Viaduct in Southern France. For years the A75 motorway was interrupted by the Tarn Valley and traffic ground to a halt in summer. A link was needed between two plateaux but a bridge was considered impossible because of the 2.5 km span.

But Michel Virlogeux, of the French government's big roads division, thought otherwise. He was head of bridge engineering, and he wanted a bridge. He teamed up with Foster and Partners to design it and had to resign from his job in the process. The result is the tallest, longest cable-stayed bridge in the world and a synthesis of engineering and architecture in true Brunellian style.

Its construction was also daring. Decks were built at each side of the plateaux and pushed out over the valley until the two halves met 270m above the River Tarn. Even though it is in an area of outstanding beauty, the bridge quickly become accepted by locals and is a tourist attraction as well as a way of getting to the coast.

After innovation, the second-greatest contribution Brunel made was research and development

James Dyson

The most radical of Brunel's bridges is the Royal Albert Bridge crossing the Tamar in Cornwall, which has many parallels with the Millau Viaduct. It combines a bowstring arch with the deck suspended from this. It was challenging to build. The two spans were built on shore and floated onto the river, jacked up as the support piers rose, then dropped into position. Like the Millau Viaduct it is an elegant design in a beautiful place.

Technological feats that compare with Brunel鈥檚 - the Millau Viaduct in southern France

Who is today's Brunel?

Finding a modern equivalent of Brunel is impossible because no one person takes on such a wide-ranging role. Even the Millau Viaduct was a collaboration between an architect and an engineer.

But some people come closer than others. Masterton reckons the inventor Sir Clive Sinclair had some of Brunel's characteristics. He developed the first pocket calculator, digital watch and personal computer and turned these into commercial successes. Inexplicably he switched to personal transport and came up with an electric tricycle, the C5, which made him a national laughing stock. Success and failure were the two sides of Brunel's legacy, but he always bounced back with a bigger and better idea, unlike Sinclair, who faded into obscurity.

We have two other contenders. Historian Buchanan suggests Bill Gates for "making a great success of engineering know-how, thinking big and producing big results". Expedition's Wise suggests another. "Richard Branson is doing transport, pioneering stuff on the space race and exploiting technology faster than anyone else," he says. "There is nobody from construction or the design side that is doing such ground-breaking stuff." But what do you think?

Technological feats that compare with Brunel鈥檚 - the human genome project