Hybrid cars are a great way of experiencing the combination of electric and fuel-powered driving, with 740,000 of them on UK roads as of November 2024¹. With several options to choose from, drivers can find a hybrid vehicle that suits their lifestyle for a driving experience tailored to them. But which is best for you? 

 

Below, we’ll explore full hybrid vs plug-in hybrid and mild hybrid cars so you can fully understand the difference and be well-equipped to find a hybrid car to suit you.

Hybrid cars: What’s the difference?

There are 3 types of hybrid cars: mild hybrid, plug-in hybrid and hybrid electric vehicles. So, what’s the difference? We’ll compare these three types below:
Mild hybrid vehicles (MHEV)
An electric motor works alongside an internal combustion engine to improve performance and efficiency. MHEVs cannot run on electric power alone.
Plug-in hybrid vehicles (PHEV)
A PHEV has both an electric and an internal combustion engine. PHEVs can be driven purely by electric power. The electric range tends to be around 30-50 miles. When the electric charge runs out, the fuel-powered engine will kick in. You’ll need to plug your PHEV into a wall or public charger to top up.
Hybrid electric vehicles (HEV)
Also known as self-charging hybrids or full hybrids, HEVs charge using regenerative braking. They can drive a short distance at low speed on electric power, and when this is depleted, the internal combustion engine will kick in. They don’t require charging infrastructure.
Mild hybrid vehicles (MHEV)
An electric motor works alongside an internal combustion engine to improve performance and efficiency. MHEVs cannot run on electric power alone.
Plug-in hybrid vehicles (PHEV)
A PHEV has both an electric and an internal combustion engine. PHEVs can be driven purely by electric power. The electric range tends to be around 30-50 miles. When the electric charge runs out, the fuel-powered engine will kick in. You’ll need to plug your PHEV into a wall or public charger to top up.
Hybrid electric vehicles (HEV)
Also known as self-charging hybrids or full hybrids, HEVs charge using regenerative braking. They can drive a short distance at low speed on electric power, and when this is depleted, the internal combustion engine will kick in. They don’t require charging infrastructure.

Mild hybrids vs. plug-in hybrids vs. full hybrids: the benefits

When choosing a new hybrid car, you need to understand what the benefits of each are so you can make the right decision. Listed below are the advantages of each type of hybrid car:
Mild hybrid vehicles (MHEV)
  • Improve mileage for enhanced efficiency, using regenerative braking to help with acceleration
  • Lower emissions than ICE cars 
  • No need to plug in to charge - they recharge on the go 
  • Lower purchase price due to smaller electric battery 
  • Start-stop technology makes for a smooth driving experience
Plug-in hybrid vehicles (PHEV)
  • Switch between electric and ICE power depending on your preferences 
  • Use all-electric driving for shorter journeys 
  • No range anxiety - the internal combustion engine kicks in when the electric charge is depleted
  • Zero emissions on shorter, all-electric journeys 
  • A great option for commuting
Hybrid electric vehicles (HEV)
  • No need to plug in to charge 
  • A great option for city drivers 
  • More economical and fuel-efficient than ICE cars 
  • Internal combustion engine backs up electric power when depleted

Mild hybrids vs. plug-in hybrids vs. full hybrids: the disadvantages

It helps to weigh up the disadvantages when it comes to MHEV vs PHEV vs HEV. Let’s compare your 3 options below:
Mild hybrid vehicles (MHEV)
  • MHEVs don’t give you the option to drive fully electric, which also means increased emissions 
  • An MHEV’s engine is always in use to drive the car 
  • MHEVs are the least efficient option when compared with PHEVs and HEVs
Plug-in hybrid vehicles (PHEV)
  • More expensive upfront cost due to complex internal hybrid systems 
  • Less economical on longer trips 
  • Increased maintenance costs due to more internal parts
Hybrid electric vehicles (HEV)
  • Limited electric range - low speed, short distances only 
  • Not fully emissions-free 
  • Reduced fuel efficiency on long journeys and motorway drives 
  • Less powerful than ICE and electric cars 
  • Higher maintenance costs for specific self-charging hybrid parts

How do I choose a hybrid vehicle?

While self-charging, plug-in and mild hybrid cars are a good choice if you’re looking for improved efficiency and reduced emissions, you’ll need to consider a few factors to find which is best for your lifestyle. Think about the following:

 

 

Mild hybrid vehicles

(MHEV)

Plug-in hybrid vehicles 

(PHEV)

Hybrid electric vehicles 

(HEV)  
Driving habits Mild hybrid cars rely on petrol or diesel, so you won’t have to worry about range anxiety. They are more efficient than ICE cars Drive on pure electric power over shorter distances. Range anxiety is reduced as the ICE is used when the electric charge is depleted Drive short, low-speed distance on electric power. HEVs are a good choice for inner-city, stop-start driving
Fuel efficiency The small motor can improve efficiency but the environmental impact will be more modest The most significant fuel savings of all hybrid cars. The electric motor reduces daily fuel consumption Better fuel efficiency than MHEVs because of all-electric driving for short distances. HEVs reduce fuel consumption with the help of an electric motor.
Cost Typically the most affordable option. The smaller battery means lower upfront costs PHEVs are more expensive upfront but come with a more complex electric motor and engine system. Costs may be offset by money saved on fuel More expensive than MHEVs due to the larger battery and advanced hybrid system.
Convenience No charging is needed with an MHEV making them a good choice for those without access to charging infrastructure and who want to reduce their carbon footprint PHEVs need to be plugged in to get the best from the hybrid system. You’ll need access to a charging point to benefit from pure electric driving HEVs don’t require external charging. They recharge through regenerative braking. If you don’t have access to charging infrastructure, a HEV could be a great choice.

 

 

Hybrid cars vs. electric cars: Which is best?

While hybrid cars are incredibly popular, the number of electric vehicles is increasing on our roads, with 18% of all cars sold in 2024 powered solely by electricity². When weighing up your options when it comes to plug-in hybrid vs hybrid cars, you should also consider fully electric cars. Which would work best for you? Find out more with our guide: HEV, BEV and PHEV explained: What's the difference? 

 

Electric cars rely fully on electric power, unlike hybrid cars which have an internal combustion engine to use when charge is depleted. While pure-electric driving is emission-free, you’ll need access to charging infrastructure to keep your car topped up and ready to drive. You’ll also need to consider how far you’re driving, especially on longer distances so you can plan to stop and recharge. 

 

If you’re looking for a car with zero emissions, an electric car is the best choice. If you can install a home charger or charge at a public charging station, you’ll be able to take advantage of some of the best technology in the automotive market. For example, BYD electric cars boast the Blade Battery for longevity and improved safety, along with a range of internal features to make driving more comfortable and convenient. 

 

If you want to experience a combination of electric and ICE driving, a plug-in hybrid car could be the best choice for you for improved fuel efficiency and reduced range anxiety. 

 

Find out more about hybrid cars including how they work and the advantages and disadvantages of hybrid cars with our comprehensive guides. Learn more about BYD hybrid cars, including the BYD SEAL U-DMi and the innovative technology used for an enhanced driving experience, including the bespoke Blade Battery and the Ultra-Efficient Xiaoyun Hybrid Engine. 

 

If you’re weighing up your options, learn more about BYD electric cars, including the BYD ATTO 3 and BYD DOLPHIN for an emissions-free experience on the road. 


¹ https://www.zap-map.com/ev-stats/ev-market
² https://www.zap-map.com/ev-stats/ev-market