To be honest, this is my "go-to" car that I always use for 500PP. Rather than telling you another car to use, maybe we can help you drive this one better. It's a very solid car.
What place are you coming in? If it's in the top half, you just need to adjust your driving - if it's the bottom half, you might need to adjust your tune. One of the keys to driving this car is smooth exit, as all rear wheel drive cars. Don't give too much gas during the apex or coming out of the corner. This car also has a bit of understeer but that can easily be tuned out if you know how - or search for a tune from the "Tuning Section".
Are you using stock suspension/LSD? For LSD, try using 7/15/8 - suspension (if you're not a strong tuner) use the hard suspension. As for transmission, which is important in some cases - lower the top speed a bit if it's a technical/short track and lower it about two notches (from default) if you're on a track with long straights. This car has a good top speed by default so most likely you'll need to lower it a bit, to gain more acceleration. Mine usually sits around 280km/h as a good starting point then adjust according to track.