Why Electric Vehicles (EV) are More Energy Efficient than Traditional Diesel Cars?

Do you know which is one of the largest sources of climate pollution in the World?

Probably you guessed it right. Yes, it is the transportation sector!! Today, we would like to discuss the revolution in the transportation sector aimed to reduce and eventually diminish the pollution issue forever.

To solve our climate disaster issue, we need to make our travel as less polluted as possible. For this Electric mobility or as you know Electric Vehicle (EV) is the ultimate solution. EVs emit no tailpipe pollutants, although the power plant producing the electricity may emit them.

With a projected higher share of solar in the world’s electricity generation mix for the future, EVs would become one of the key measures to reduce Green House Gas (GHG) emissions and help India meet its international climate change commitments and National Determined Contribution (NDC) targets. Electric Vehicles provide quiet/smooth operation and stronger acceleration. Therefore EVs require less maintenance than other conventional Internal Combustion Engine Vehicles (ICEV) like petrol and diesel vehicles.

EVs are three-to-five times more energy-efficient than conventional ICEVs. Conventional ICEVs only convert about 12%–30% of the primary energy stored in fuel to power, while EVs convert over 77% of the electrical energy input from the grid to power. Hence with EVs we get much better power conversion at comparatively lesser consumption of fuel. For instance, the operating cost of EV is about INR 1 per km in contrast to an operating cost of INR 6 per km for conventional ICEVs like diesel and petrol vehicles.

In addition to providing a clean environment, this provides unmatched energy efficiency improvement potential and cost savings for the transportation sector. Using the related information the end-user can also make a better informed decision while selecting the right set of vehicle type for the next purchase or travel.

Still wondering if you should switch from your existing petrol and diesel vehicles to electric vehicles?

Here, we have further explained about energy savings through various technical parameters and mathematical calculations.  Know more about how electric vehicles can provide energy savings of about 65-70% and CO2 reduction of 25-30% in comparison to traditional vehicles. For easier understanding, we have taken an example of conventional diesel vehicles (AC variants) in India.

Below tables provide the details of estimations to showcase the variations on technical parameters like MTOE per Year, MTCO2 Emissions per year, Savings per year and Savings (%):

Estimation of various technical parameters using Diesel Vehicles

S.NoDetails (Estimated)
Diesel (AC)
1No. of Buses10
2One Year running (kms)1,50,000
3Diesel Mileage (km/litre)3.6
4Calorific Value of High Speed Diesel (KCal / Kg)11,840
5Density (kg/litre)0.8263
61 MTOE (Metric Ton of Oil Equivalent) (Kcal)10,000,000
7MTOE/litre in kCal (=11,840 kcal*0.8263 kg/L /10^7)0.000978339
8Diesel Consumption (litres / year); One bus (1,50,000km / 3.6 km/L)41,667
9MTOE / Bus/Year ; = 0.00097834* 36,66735.87
101 litre diesel (= Kg of CO2); 2.68
11MTCO2 Emissions Year; = 41,667 L*2.68 kg of CO2/L / 1,000111.6

Estimation of various technical parameters using Electric Vehicles

S.NoDetails (Estimated)
Diesel (AC)
1No. of Buses10
2One Year running (kms)
3Electric Bus Mileage (kWh/Km)0.750
41 MTOE (Metric Ton of Oil Equivalent) (kcal) 10,000,000 10,000,000
51kWh per kilo calorie860
6Heat Rate (Kcal/Kwh); CEA2,375
7All India Transmission & Distribution Losses; CEA20%
8Emission factor; CEA0.83
9Thermal Generation in FY 2019-20 (%); CEA86.28%
10Electricity Consumption (kWh); One bus (1,50,000 km*0.75 kWh/km) 1,12,500 1,12,500
11Thermal consumption kWh; = 1,12,500*0.862897,065
12Others consumption kWh; = 1,12,500 -97,06515,435
13Thermal Consumption in Kcal; = 97,065 kWh * 2,375 KCal/kWh230,529,375
14Others consumption in Kcal;= 15435 kWh*860kCal/kWh13,274,100
15Overall Energy Consumption in KCal ;= 230,529,375 + 13,274,100243,803,475
16MTOE In KCal terms;= 243,803,475 / 10^724.38
17MTOE In KCal terms including T & D Losses 20%;= 24.38 * 1.20 (T&D losses)29.25
18MTCO2 Emissions Year;= 1,12,500 * 0.83 93.37

Summary : Electric Vehicles VS Diesel Vehicles

Diesel Bus (AC)Electricity Vehicle busSavings /YearSavings (%)
1MTOE per Year35.87 29.25 6.6222%
2MTCO2 Emissions per year 111.693.3718.2313%

Based on the above results, it is evident that energy savings are in the range of 22% and CO2 emission reductions are in the range of 13% by switching from ICEV to EV’s. Thus, it is advisable to buy an electric vehicle for your next purchase.

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One Thought to “Why Electric Vehicles (EV) are More Energy Efficient than Traditional Diesel Cars?”

  1. Robin Jonas

    This article is well written and explains very basic mathematical concepts to understand why electric vehicle is better than conventional vehicles. Keep posting !!

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