Advise of better and correct approach in creating object and using in Type script and angular?

Here is code

// ********** First Approach 

class MyCarComponent {
    private car: object = { };

    constructor(){
        this.car['name'] = "AudI";
        this.car['model'] = "2017";
    }
}

// *********** 2nd Approach 
class Car {
    name: string;
    model: string;
}

class MyCarrComponent {
    private car: Car = new Car();

    constructor(){
        this.car.name = "AudI";
        this.car.model = "2017";
    }
}

Please comment for correct appraoch