When it was introduced in April 1970, it was the first four-wheel drive kei car to enter series production. The LJ10 Jimnys had 16-inch wheels, weighed 590 kg (1,301 lb), and had a top speed of 75 km/h (47 mph). The engine was soon uprated to 27 PS (20 kW; 27 bhp), but the claimed top speed remained unchanged.[7]