Nairobi National Park boasts to be one of the only natural game reserves in the world,literally inside a city. Located just 10 mins from the city centre off Langata Road,its ideal to get your first feel of what Kenya has to offer, or for those quick visits without the time to see the Mara, Serengeti, Amboseli, etc.,its the ideal park to visit.
You will be most comfortable in a four wheel drive, van, jeep, or truck, as the terrain remains natural and rough. You can use a saloon,though it will most definitely be a rough drive.
There are many car hire firms that offer pick ups and drops in vans, costing anything between Kshs 6000 to 15,000 per day.