The shift from internal combustion engine (ICE) vehicles to electric vehicles (EVs) represents one of the biggest technological changes the automotive industry has ever seen. While both types of cars look familiar on the outside, what sits beneath the bodywork is fundamentally different. Understanding these differences helps explain why EVs drive, feel and behave the way they do — and why they are increasingly seen as the future of mobility.
The Biggest Change: How Power Is Created and Used
At the heart of every electric vehicle is a high-voltage battery pack. This component replaces the fuel tank and engine combination found in ICE cars. Instead of storing petrol or diesel, the battery stores electrical energy, which is then used to power one or more electric motors.
Electric motors differ greatly from combustion engines. They convert electrical energy directly into motion with far fewer mechanical steps. However, batteries deliver electricity as direct current (DC), while most electric motors operate on alternating current (AC). This is where power electronics come into play. An inverter acts as a translator, converting DC from the battery into AC for driving, and reversing the process during regenerative braking to send energy back into the battery.
This system is one reason EVs are so efficient. During braking or deceleration, energy that would normally be wasted as heat in an ICE car is partially recovered and reused.
Charging, Heating and Electrical Systems
EVs also require new systems that ICE vehicles simply don’t need. An onboard charger converts AC power from the electricity grid into DC to charge the battery, while fast DC chargers bypass this component altogether. A DC/DC converter steps high-voltage battery power down to 12 volts to run familiar features such as lights, infotainment and power windows.
Heating is another major difference. Combustion engines naturally produce excess heat, which can be used to warm the cabin. Electric drivetrains, by contrast, are highly efficient and generate little waste heat. As a result, EVs rely on electric heaters or heat pumps to warm both passengers and the battery, particularly important in colder European climates.
What Feels Different on the Road
While both ICE cars and EVs use transmissions, electric cars usually rely on a single-speed gearbox. Electric motors deliver maximum torque almost instantly, removing the need for multiple gears. This is why EVs feel smooth and responsive, especially at low speeds.
Braking systems also operate differently. In everyday driving, EVs often slow down primarily through regenerative braking, using the motor as a generator. Conventional hydraulic brakes step in only when stronger stopping power is needed, reducing wear on brake pads and discs.
Maintenance is another key distinction. Electric motors have very few moving parts and require minimal servicing compared to combustion engines, which depend on oil changes, belts, filters and complex mechanical systems.
What Remains the Same
Despite these changes, much of a car remains familiar. Suspension layouts, steering systems, wheels and tyres are largely shared between ICE and electric models. Modern EVs use the same advanced steering technologies needed for driver assistance and automated features, and tyre designs increasingly overlap as both vehicle types focus on efficiency and reduced drag.
The Bigger Picture
Ultimately, the differences between ICE cars and EVs stem from their propulsion systems. Yet the similarities matter just as much. By retaining many conventional automotive components, manufacturers have made EVs easier to adopt, more affordable, and instantly familiar. That balance is helping electric vehicles move from early adoption into the mainstream — especially in markets where the transition to cleaner transport is accelerating.
