Bajaj Auto is speeding up the work on the investment nitty gritties for the ultra low cost car project with its joint venture partners Renault and Nissan. With motorcycle sales slowing down, Bajaj Auto is making sure that it doesn’t shell out too much for adding the two extra wheels. Bajaj Auto will invest around Rs 250 crore in equity for the car project while its partners Renault and Nissan will bring in another Rs 500 crore.