Tesla S Roadster
Mr Johnson test drove the Tesla S Roadster at The Intelligence Squared Green Festival on Climate Change back in 2009, when it was officially (kind of) the world's first full-electric car.
Even though the Tesla S is 100 per cent electric, it still achieves a 0-60mph sprint time of less than four seconds. But it isn't cheap as it cost £92,000 upon its initial release in May 2009.
Boris Johnson on the Tesla S Roadster: "What I really want is a people carrier".
Back in 2011 at the EcoVelocity show Boris couldn't help himself taking a spin in the Renault Fluence ZE.
Here is a full review of the Renault Fluence.
The Fluence uses a full electric powertrain delivering 226Nm of torque and 70kW of power, which is equivalent to 95bhp. It can travel up to 115 miles off a single charge.
Boris Johnson on the EcoVelocity show: "Trying out cutting edge vehicle technology is what Europe's largest green car show is all about."
Here is an image of Boris leisurely leaning on the Citroen C-Zero.
The Citroen C-Zero was yet another addition to the Source London Campaign line-up and is akin to both the Mitsubishi i-MiEV and Peugeot iOn.
The C-Zero offers zero tailpipe emissions and can travel for up to around 100 miles off a single charge. However, the C-Zero is pretty steeply priced at around £27,000, after the £5,000 government grant.
Boris Johnson on the Citroen-Zero: "Through the development of Source London we are seeking to create the fertile conditions for electric vehicles to flourish."
This is another car the Major of London got to test drive around the city as part of his Source
The Nissan Leaf can travel up to 109 miles off a single charge and is capable of a top speed of 90mph.
The Leaf is renowned for its strange bulging headlights and charge adapter under its Nissan badge. The Leaf was one of the first electric cars to give the EV market a significant boost in sales and popularity.
Boris Johnson on the Nissan Leaf: "We are looking forward to Nissan becoming one of our fantastic Source London partners".
Mitsubishi i- MiEV
Boris drove the tiny-but-cripplingly-expensive Mitsubishi i-MiEV to promote his Source London electric vehicle campaign, which plans to make London greener with more electric charge points and vehicles.
The Mitsubishi i-MiEV is an electric version of the Mitsubishi i model and was launched in 2009. With a range of around 100 miles the i-MiEV an adequate travel distance for the city environment.
Boris Johnson on the Source London campaign: "Make our city the electric driving capital of Europe."