sentences:  In 1928 the 1500 Sport was presented, which was the first Alfa Romeo road car with double overhead camshafts.In the mid-1920s, Alfa's RL was considered too large and heavy, so a new development began.The 2-litre formula that had led to Alfa Romeo winning the Automobile World Championship in 1925, changed to 1.5-litres for the 1926 season.