The driving distance between Singapore and Mumbai is approximately 6,190 - 6,206 km. This expedition involves crossing several countries including Malaysia, Thailand, Myanmar, and Bangladesh, each with its own visa, border crossing regulations, and road conditions. Fuel costs will vary significantly across these countries, and tolls are present in Singapore (ERP, highway tolls), Malaysia, and India (FASTag). This option is generally considered impractical for typical travel due to its complexity, time commitment, and logistical challenges, including vehicle insurance, international driving permits, and extensive planning for border formalities and safety.