BMW has expanded its range of security vehicles to include the new X5, offering protection from firearms attack, robbery, kidnap and car-jacking.

The X5 Security joins the 7-series High Security and the 3-series Security, which look almost identical to the standard road cars but are heavily armoured, featuring significant modifications such as bullet-resistant, reinforced passenger cells, triple glazing and strengthened door joins.

The X5 4.4i Security uses run-flat tyres and reinforced glass capable of withstanding an attack by a .44 Magnum. However, its 320bhp engine allows it to accelerate from 0-62mph in 7.6 seconds, with a maximum speed of 130mph.

BMW offers a buy-back scheme for all the vehicles up to seven years old.