This 5-hr-tour includes a visit to the Sugar Loaf (396m a.s.l.) by a set of cable cars, from where one has a spectacular view of the Guanabara bay and downtown Rio, followed by a city tour, with highlights such as the principal attractions of downtown, the Sambodromo, the Maracana, the modern cathedral, the Sao Bento monastery, etc..-
all driven in a luxury sedan for 4 passengers max.
Since you'd be paying by the hour, you can make some of your own choices, like, f. ex., lunch (not included) at the famous traditional "Colombo" restaurant, or in the bohemian borough of Sta. Teresa.
Also: A short helicopter flight (not included) can be booked off the Sugar Loaf.