Locally
Portsmouth is a small city and most places are fairly walkable from our apartments, so you can probably leave the car during your stay. If you are using an electric car there are Vehicle electric charging points on street close to our apartments via ubitricity https://www.ubitricity.co.uk/residential_charging/ and at many car parks throughout the city which can be found via https://www.portsmouth.gov.uk/ext/parking-travel-and-roads/travel/electric-charge-points
Buses are frequent and convenient - First Buses and Stagecoach operate around the city,
Taxis are reasonably prices for bigger groups. Aqua Cars 02392818123. Uber is also commonly used
Further afield
The isle of wight makes a lovely day trip or a longer stay. It can be reached on foot either via The 10 minute hovercraft flight from Southsea Beach or 22 minutes on the fast cat from Portsmouth Harbour, both to Ryde. Buses provide an excellent service on arrival
If you are taking the car over then the car ferry from Gunwharf Quays will take around 45 mins to Fishbourne
Train and buses within easy walking distance for day trips out to Winchester, Chichester, Brighton and London