Nested fully qualified property name using reflection

I have the following classes:

public class Car
{
    public Engine Engine { get; set; }    
    public int Year { get; set; }        
}

public class Engine 
{
    public int HorsePower { get; set; }
    public int Torque { get; set; } 
}

I'm getting all the nested properties using this:

var result = typeof(Car).GetProperties(BindingFlags.Public | BindingFlags.Instance).SelectMany(GetProperties).ToList();

        private static IEnumerable<PropertyInfo> GetProperties(PropertyInfo propertyInfo)
        {
            if (propertyInfo.PropertyType.IsClass)
            {
                return propertyInfo.PropertyType.GetProperties().SelectMany(prop => GetProperties(prop)).ToList();
            }

            return new [] { propertyInfo };
        }

This gives me all the properties of the class. However, when I try and get a nested property from an object, I get an exception:

horsePowerProperty.GetValue(myCar); // object doesn't match target type exception

This happens because it can't find the property HorsePower on the Car object. I have looked at all of the properties on PropertyInfo and can't seem to find anywhere that has the fully qualified property name. I would then use this to split strings, and recursively get the properties from the Car object.

Any help would be appreciated.