Hi Swapnil The acceleration of the car is highly dependent of the power, torque and the transmission gearbox. Chevrolet Beat is packed with a 1.2 L petrol light weight DOHC engine that reduces friction and performs better. The engine is packed with 5 speed manual transmission gearbox that is economical to run, thanks to its excellent mileage. This Inline type engine is a great performer and produces highest power and torque along with an improved compression ratios and delivers better acceleration. This highly advanced engine of Chevrolet Beat crosses the barrier of 100 kms in just 15.5 seconds and carries a top top speed of 145 kmph. Thanks,
Please check following things
1. Is Fuel pump noisy. If yes change the fuel pump motor. Its cheaper than replacing whole fuel pump.
Swift Diesel Fuel pump motor is compatible
2. Check Battery voltage at Glow plug point it should be minimum 10.5V. If not change battery
3. Last option is check fuel injector leakage and get it callibrated
It is advisable to start a car once in a week or two and take it for a spin if possible, so the battery get recharged. Also, if you are planning to park it for a longer period, we will advise you to get jack stands and also to disconnect battery terminals, then you won't need to start it again and again.
What we can understand from your question is that, your tachometer is not coming up and the car is not starting. It could be because of a dead battery, we will recommend you to jump start your car if you don't have jumper cables and a good battery, you should it take it to the nearest service center. Other problem can be related to the start relay or electricals of the car.